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Alexandrite Lab Grown Gemstones

Lab Created Alexandrite Alex.jpg (11911 bytes)

 

Alexandrites are amazing gemstones for jewelry, because faceted gems undergo a dramatic color change in different types of light. An example of this property is shown at the left. In warm incandescent or candle lighting, this gem is a rich purplish red color.  In cool florescent or outdoor light, it is blue or greenish-blue. To see the extremes of the color change one would need to be in environments in which these light sources are pure, but nonetheless, significant color difference can easily be observed in various lighting. Our lab grown or created man-made alexandrite, like natural alexandrite,  is a member of the chrysoberyl family which has the chemical composition beryllium aluminum oxide (BeAl2O4). Be cautious when buying lab alexandrite, because many dealers indiscriminately use the term for imitations (such as color-change corundum). Chrysoberyl occurs in a range of colors including green, yellow, and brown, and often exhibits a cat's eye chatoyancy. The name alexandrite is reserved for the very rare and valuable color-change variety of chrysoberyl. The best natural chrysoberyl, including alexandrite, has been found in the Ural mountains of Russia.  In fact, the color-change variety is named after Tsar Alexander of Russia because it was discovered in 1830 on the day of his coming of age. In this time and place, the cold winter outdoor light versus warm indoor candle and gas lamp lighting were ideal for showing the full red-to-green range of color change in this gem. In intermediate, typical mixed-source modern room lighting these stones often appear purple, with flashes of the other colors. Natural alexandrite is so rare that few people have ever seen one, and its value is on a par with emeralds, rubies, and sapphires. 

Our lab-grown crystals have higher perfection than is usually seen in natural stones.  We are able to offer them at a small fraction of the cost of comparable natural stones. We categorize the degree of color change in six subjective ranges: outstanding, excellent, very good, good, fair, and minimal. The price per carat varies accordingly. Stones with little color change tend toward a pleasant wine-red color.  We can set these gemstones for you in silver or  gold jewelry mountings. Ask for details.  You can click on any underlined Item # to see a photo of the gem.  Use your browser's "back" button to return to the list. Please be aware that it is difficult to capture the true colors of alexandrite in our photographs because they depend so much on the type of lighting.

June 2024: The below listings are up to date. We will have more lab alexandrites available in the future, but it will probably take about 6 months. 

Item#

Item Description

Price

21000

Round brilliant cut Laboratory grown color change Alexandrite

21005

5 mm round In the 5mm size we have one lab alexandrite faceted in a round Portuguese brilliant flower cut. It has excellent color change and very good clarity (some very small inclusions). The weight is 0.56 ct., priced at $99/ct.   
sold

$55.44

21006

6 mm round Like natural alexandrites, our lab-grown alexandrites have a hardness of 8.5 on the Mohs scale (next to Ruby at 9). They are excellent for jewelry, and these 6mm rounds are a versatile size and shape. Their degree of color change is excellent: blue-green in sunlight and under cool fluorescents, while plum red under very warm light such as candlelight. They're faceted in a Portuguese brilliant flower cut, and have excellent clarity. The average weight is 0.95ct, priced at $115/ct. Price shown is per gemstone. 13 10 8 6 3 2 1 0 available.
sold  

$109.25

21007 7 mm round At 7mm, we have six 5 4 3 2 0 round lab alexandrites available with excellent color change (blue-green in cool light like sun and cool florescent; plum in very warm light like candlelight). They weigh 1.49 ct. on average, and have excellent clarity. Faceted in a Portuguese brilliant flower cut. Priced at $115/ct., and the price shown at right is per individual gemstone.


 sold  

$171.35

21008

8 mm round This beautiful, 8mm round lab alexandrite is faceted in a Portuguese brilliant flower cut and has excellent clarity and degree of color change. In sunlight and under cool fluorescent lights these gems appear blue-green, while under very warm lights (such as  candlelight) they are a rich plum color. One available, and the weight is 2.28ct. Priced at $115/ct.
sold

 

$262.20

21009 9 mm round In the 9mm size we have one gorgeous lab alexandrite faceted in a round Portuguese brilliant flower cut, with excellent color change and clarity. This size could be used in a variety of types of jewelry. The weight is 3.28 ct. and it's priced at $115/ct.


sold

$377.20

21010 10 mm round These 10mm round size Portuguese brilliant flower cut lab-grown alexandrites would be nice as a man's or a ladies ring, or as a pendant. They have excellent clarity and color change, from blue-green in cool light like sun and cool fluorescent, to plum red in warm light like incandescent or candlelight. The weight is 4.41ct. on average. Priced at $115/ct. There are three 2 1 0 available.


sold

$507.15

21012 12 mm round This 12mm is (sold) the largest size round we've ever carried in a Portuguese brilliant flower cut lab-grown alexandrite. With excellent clarity as well as excellent degree of color change, it is very impressive!  The weight is 8.05ct. Still priced at $115/ct like the smaller gems.


sold

 

$925.75

21100

Oval brilliant cut Lab grown color-change Alexandrite

21164

6x4 mm oval We have three two none 6x4mm oval Portuguese brilliant flower cut, lab alexandrites available. They have excellent color change and excellent perfection. Their average weight is 0.45 ct., priced at $115/ct. Price shown at right is per gem.


sold

$51.75

21175

7x5 mm oval A nice pair one 0 of 7x5-mm oval lab-grown alexandrites are available (sold individually). Faceted in a Portuguese brilliant flower cut, they have excellent color change and clarity, and an average weight of 0.92 ct. The price is $115/ct. The price shown is per gemstone.


sold

$105.80

21186 8x6 mm oval 
 
These lab alexandrites have excellent color change, going from blue-green in sunlight and under cool fluorescent lights to plum-red under very warm lights such as candlelight. In the 8x6mm oval size we have three 2 1 0 available, faceted in a Portuguese brilliant flower cut. They have excellent clarity, weigh 1.45ct on average, and are priced at $115/ct. The price is per gemstone.

 
 sold

$166.75

21197 9x7 mm oval Like 21186 above, these lab alexandrites also have excellent color change, going from blue-green in sunlight and under cool fluorescent lights to plum-red under very warm lights such as candlelight. There are is 6 5 3 2 0 available in the 9x7mm size Portuguese brilliant flower cut ovals, with excellent clarity. The average weight is 2.25ct, and they're priced at $115/ct.; price shown is per stone. sold
 
$258.75
21108 10x8 mm oval There are four 3 of these 10x8mm oval Portuguese brilliant flower cut lab-grown alexandrites available. They're priced at $115/ct. Excellent color change as well as clarity. Alexandrite is great for frequently-worn jewelry, due to its hardness rating of 8.5 on the Mohs scale. The average weight of these gemstones is 3.19 ct., the price shown is per stone.   $366.85
21119 11x9 mm oval 11x9-mm lab alexandrites with excellent color change, faceted in an oval Portuguese brilliant flower cut.  There are three two one.  The hardness of these gems is 8.5 on the Mohs scale (only ruby, sapphire, and diamond are harder) and they hold up well to rough wear.  The average weight is 4.40 ct. Priced at $115/ct.    sold 

$506.00

21120 12x10 mm oval These six five four three 12x10mm oval lab alexandrites have a gorgeous deep color along with excellent color change and clarity. They're faceted in a Portuguese brilliant flower cut, and on average weigh 5.56 ct. These are very nice gems! Priced at $115/ct. The price shown is per gemstone.   

$639.40

21140 14x10 mm oval The average weight of these four gorgeous lab alexandrites is 7.12 ct. They are faceted in a 14x10-mm oval Portuguese brilliant flower cut.  Excellent color change and clarity. Priced at $115/ct. The price shown at the right is per stone.  

$818.80

21300

Antique cushion cut Laboratory-grown color-change Alexandrite
21308 10x8 mm cushion This is a nice cut, a little different from the usual oval or rectangular styles. There are 2 1 of these 10x8-mm cushion cut synthetic alexandrite gemstones available. They're priced at $115/ct.  Excellent color change as well as clarity.  The average weight is 3.56 ct.  The price shown is per stone. sold $409.40

21400

Square cut Laboratory-grown color-change Alexandrite

21404

4 mm square mixed cut We have four 3 1 0 of these small 4mm square lab alexandrites faceted in a mixed cut, with excellent color change and clarity. The average weight is 0.39 ct. Priced at $115/ct, and the price shown is per gem.

sold

$44.85

21405

5 mm square cut-corner
radiant cut
We have six four three one sold 5mm square lab-grown alexandrite faceted in a cut-corner radiant cut. They have excellent degree of color change and excellent clarity. The average weight is 0.69 ct. Priced at $115/ct, and the price shown is per gemstone.

sold

$79.35

21406

6 mm square cut-corner
radiant cut
There are ten nine eight seven six 5 3 2 1 lab-grown alexandrites available in the square 6mm size that have excellent color change, as well as excellent clarity and sparkle. They are faceted in a cut-corner radiant cut, and on average weigh 1.12 ct. Priced at $115/ct., and the price shown is per stone.

 sold

$128.80

21406p

6 mm square princess cut 
 
The four three two one 0 6mm square princess cut lab alexandrites shown at the left in the photo are still available.. They have excellent color change and clarity. The average weight is 1.24ct., and they are priced at $115/ct. The price shown is per gemstone.

sold

$142.60

21407 7 mm square cut-corner
radiant cut 
 
In the 7mm size we have two (a matched pair, but can be sold separately) lab alexandrites with excellent color change. In sunlight or cool incandescents they're blue-green, while in very warm light like candlelight they're plum red. Faceted in a square cut-corner radiant, with excellent clarity. The average weight is 1.94ct., priced at $115/ct. The price shown at the right is per gemstone.   sold

$223.10

21408a 8 mm square Asscher cut There are three two one 8mm square lab alexandrites faceted in an Asscher cut. This is like the emerald step cut except the outline is a square with octagonal corners. They exhibit an outstanding degree of color change and have excellent clarity. The average weight is 2.80 ct. Priced at $115/ct.; price shown is per gem.

sold

$322.00

21408p 8 mm square princess cut 
 
We have two one 8mm square lab alexandrites faceted in a square princess cut. Excellent color change and clarity. Great for earrings, pendants, or rings. The hardness of this stone gives it durability, making it ideal for use as jewelry. The average weight is 2.96 ct. Priced at $115/ct, and the price shown is per gem.

sold

$340.40

21408 8 mm square cut-corner
radiant cut
Also in the 8mm square size, we have two one lab alexandrites faceted in a cut-corner radiant pattern. These are really nice gems! The color change is absolutely excellent, and so is the clarity. The average weight is 2.80 ct. Priced at $115/ct, and the price shown is per gem.

 
   sold
 

$322.00

21409

9 mm square cut-corner
radiant cut
This is a nice, versatile size for a variety of types of jewelry.  We have four three two 9mm square lab grown alexandrites, again with excellent color change and clarity. They're faceted in a cut-corner radiant cut.  The triangular facets on crown and pavilion give a lot of life to these stones. The average weight is 3.82 ct., priced at $115/ct. The price shown is per gem.  

$439.30

21410p 10 mm square princess cut 
 
These are very nice gems, and two one are available. A 10mm square princess-cut lab-grown alexandrite would be nice as a man's or a ladies ring, or as a pendant. They have excellent color change and perfect clarity in darker color-tone gemstones. The average weight is 5.62 ct. Priced at $115/ct., and the price shown at right is per stone.

 

$646.30

21410 10 mm square cut-corner
radiant cut 
 
We have 4 3 2 lab grown alexandrites in the 10mm size, faceted in a square cut-corner radiant pattern. These are gorgeous gems! Their color change and clarity are rated excellent. On average they weigh 5.29ct. Priced at $115/ct. The price shown is per gem.

 

$608.35

21410a 10 mm square Asscher
 
Also in the 10mm square size we have one lab-grown alexandrite faceted in an Asscher cut (which is similar to a traditional emerald cut, but square). This is a very nice gem with excellent clarity and color change. It weighs 5.47ct and is priced at $115/ct. sold

$629.05

21500

Rectangular octagon cut Laboratory-grown color-change Alexandrite

21564c

6x4 mm rectangle We have 5 3 2 1 matched gemstones in a 6x4 mm rectangular brilliant cut size of light color-toned, lab-grown alexandrite with excellent color change. The average weight is 0.63 ct. Priced at $115/ct. The price shown at the right is per stone.

  

$72.45

21564 6x4 mm rectangle In the dainty 6x4mm size we have these two one well-matched lab-grown alexandrites faceted in a cut-corner radiant pattern. Their degree of color change and their clarity are excellent. They're priced at $115/ct. and the average weight is 0.60ct. Price shown is per gemstone.     new

$69.00

 

21575

7x5 mm rectangle There are nine eight 6 5 4 2 0 gemstones in this size of lab-grown alexandrite. The average weight is 1.07 ct. Two are cut in a 7x5mm rectangular octagon step cut, while seven six 4 are faceted in a cut-corner radiant pattern. Excellent color change and clarity. Priced at $115/ct. The price shown at the right is per stone.

sold
 

$123.05

21586

8x6 mm rectangle Faceted in an 8x6mm rectangular cut-corner radiant.  We have two one in this size and style of lab-grown alexandrite. The average weight is 1.86 ct. Excellent color change.  Priced at $115/ct. The price shown at the right is per stone.     new

$213.90

21597 9x7 mm rectangle Excellent color change and clarity in this 9x7-mm rectangular synthetic alexandrite gemstone. One available, faceted in a cut-corner radiant pattern.  Priced at $115/ct. and the weight is 2.48 ct new
sold
 
$285.20
21508 10x8 mm rectangle There are seven six four 3 2 of these beautiful lab alexandrites available in the 10x8mm size, faceted in a cut-corner radiant pattern. They exhibit excellent color change and clarity, with high durability (8.5 on the Mohs hardness scale). This makes them excellent for use as jewelry. The average weight is 3.86 ct. Priced at $115/ct. The price shown is per stone.  
 
$443.90

21519

11x9 mm rectangle We have eight seven 6  5 11x9mm rectangular octagon lab grown alexandrites faceted in a cut-corner radiant pattern. This size is very versatile  for any kind of jewelry, particularly pendants or rings. The hardness of alexandrites makes them durable for daily wear. The color change and clarity of these gems is excellent: in sunlight and under cool fluorescent lights these gems appear blue-green, while under very warm lights (such as candlelight) they are a rich plum color. The average weight is 5.14 ct. Priced at $115/ct. The price shown at right is per gemstone.  

$591.10

21520

12x10 mm rectangle These large 12x10mm synthetic alexandrites would make stunning pendants! They're faceted in the cut-corner radiant pattern. Their color change and clarity are excellent. The average weight is 6.90 ct., and two of these gems are available. Priced at $115/ct. The price shown at right is per gemstone. new

$793.50

21540

14x10 mm rectangle This is a truly outstanding gemstone! There is only one none of these impressive 14x10mm lab-grown alexandrites available. It's faceted in a rectangular cut-corner radiant cut, with great sparkle. Excellent clarity and color change. It weighs 7.63ct., and is priced at $115/ct. sold

$877.45

21700

Trillion cut Laboratory-grown color-change Alexandrite

 

21706

6 mm trillion We have two lab-grown alexandrites in the 6mm size, faceted in a trillion Portuguese brilliant flower cut. The color change and clarity are both excellent in these gems. They're blue-green in sunlight and plum red under warm light like candlelight. The average weight is 0.71 ct. The price is $115/ct., and the price shown is per gemstone. sold
 

$81.65

21707g

7 mm trillion There are three two one of these versatile 7mm lab-grown alexandrites, faceted in a trillion Portuguese brilliant flower cut. They have a nice rich color tone and great brilliance. Their color change is good. The gems are clear at 10 power magnification. The average weight is 1.33 ct. The price is $99/ct., and the price shown is per gem. sold

$131.67

21708

8 mm trillion We have four 3 1 0 8mm trillion lab alexandrite with an excellent degree of color change as well as excellent clarity, faceted in the Portuguese brilliant flower style. The color change is from blue-green in sunlight or cool florescent light, to plum in warm light such as candlelight. The average weight is 1.96ct., priced at $115/ct.
sold

 

$225.40

21709

9 mm trillion We also have two one 9mm trillion lab grown alexandrites, again with excellent color change and clarity. They're faceted in a Portuguese brilliant flower cut. This is a nice, versatile size for a variety of types of jewelry. The average weight is 2.81 ct., priced at $115/ct. The price shown is per gem.  sold
 

$323.15

21710

10 mm trillion These two one 10mm trillion lab grown alexandrites, faceted in a trillion Portuguese brilliant flower cut, are a nice size for either men's or ladies jewelry. Consider one for a pendant. The clarity and color change are excellent. The average weight is 3.79 ct., priced at $115/ct. As always, the price shown is per gem.  

 

$435.85

21800

Heart-shape cut Laboratory-grown color-change Alexandrite

21806

6 mm heart These would make lovely earrings! 6mm heart shaped lab-grown alexandrite has been faceted in a Portuguese brilliant flower cut, and these gems have excellent color change and clarity. Their color is reddish plum in very warm light such as candlelight, and blue-green in the sun and under cool florescents. Their average weight is 0.78 ct. Priced at $115/ct. The price shown is per individual gemstone. 3 2 1 0 available. sold
 

$89.70

21807

7 mm heart This 7mm heart shaped lab alexandrite is very sweet looking. It's faceted in a Portuguese brilliant flower cut, and clarity and color change are excellent. The range of color change is like 21806 above. This gem weighs 1.38ct., and is priced at $115/ct. sold
 

$158.70

21808

8 mm heart We have two one very nice 8mm heart shaped lab-created alexandrites, faceted in the Portuguese brilliant flower style. Clarity and color change are both excellent. The gems weigh 2.06 ct. on average, and are priced at $115/ct. The price shown is per gem. sold

$236.90

21809

9 mm heart These three 9mm hearts have rich color and excellent clarity, and exhibit an excellent degree of color change (the red end of the range is particularly prominent). The heart shape is faceted in a Portuguese brilliant flower cut. Priced at $115/ct. The average weight of these lab grown alexandrites is 2.78 ct. The price shown is per stone.  

$319.70

21810

10 mm heart These two one 0 large heart shaped 10mm lab alexandrites are really lovely.  They're faceted in a Portuguese brilliant flower heart-shape cut, and have excellent color change and clarity. The average weight is 4.23 ct. and the price is $115/ct, priced per stone. sold

$486.45

21900

Pear-shape cut Laboratory-grown color-change Alexandrite

21996

9x6 mm pear Four Two One of these 9x6 mm pear shaped lab grown alexandrite available. They are faceted in the Portuguese brilliant flower style, and the color change and clarity are excellent. The typical weight is 1.52 ct. The price is $115/ct, priced per gem. sold

$174.80

21907

10x7 mm pear There are 5 4 3 2 1 of these nicely-sized, matched, 10x7mm lab grown pear alexandrites available. They're faceted in the Portuguese brilliant flower style, and their color change and clarity are excellent. The average weight is 2.24 ct. The price is $115/ct, priced per gem.  Great for a lady's ring or pendant. sold

$257.60

21928

12x8 mm pear In the 12x8mm size we have two one none pear shaped lab-grown alexandrites that have both with excellent clarity and an excellent degree of color change. The color change is from blue-green in sunlight or cool florescent light, to plum in warm light like candlelight. They are faceted in a Portuguese brilliant flower cut, and weigh 3.33ct. on average. Priced at $115/ct., price shown is per gemstone. sold

$382.95

21939

13x9 mm pear We have 2 1 0 of these 13x9mm pear shaped, deep-color-toned lab-grown alexandrites available. They are faceted in a Portuguese brilliant flower cut, with excellent color change and clarity. One of these would make a gorgeous pendant. The average weight is 4.63 ct. The price is $115/ct, priced per gem. sold

$532.45

21950

15x10 mm pear These two one large pear shaped 15x10mm lab alexandrites are really lovely. Two are available. They're faceted in a Portuguese brilliant flower cut, and have excellent color change and clarity. The average weight is 6.49 ct. and the price is $115/ct, priced per stone. sold

$746.35

Remember, we can set these gemstones in a variety of jewelry mountings.  Ask for details.

 
See www.siliconsultant.com 
for consulting services in silicon crystal growth.

See www.geolite.com 
for fine gemstones & jewelry