Alexandrite (20.10 Carat )
16.69 x 16.69 mm
Stone Type : | Alexandrite |
Stone Shape : | Round |
Stone Weight : | 20.10 carat |
Length X Width : | 16.69 x 16.69 mm |
Length / Width Ratio : | 1.00 |
Approx Face-up Area : | 218.84 mm² |
Approx Volume : | 1,086.38 mm³ |
How many Colors Available for Alexandrite ?
Red , Dark Red , Light Brown , Brown , Dark Brown , Light Yellowish Green , Yellowish Green , Dark Yellowish Green , Light Green , Green , Dark Green , Light Bluish Green , Bluish Green , Dark Bluish Green , Light Violet , Violet , Dark Violet , Light Purple , Purple , Dark Purple ,
Named after Czar Alexander II (1818–1881) Alexandrite is a rare and valuable color-change variety of chrysoberyl. Alexandrite possesses a surprising ability to change color - from green or bluish-green in daylight, it transforms to purplish or raspberry red in incandescent light.
Name of Stone : | Alexandrite |
Mineral : | Chrysoberyl |
Shape : | Round |
Chemical Formula : | BeAl2O4 |
Crystal Structure : | Orthorhombic |
Hardness : | 8.5 |
Specific Gravity : | 3.7 |
Carat weight : | 20.10 carat |
Gram weight : | 4.020 gm |
Ounces weight : | 0.1418 ounces |
Length : | 16.69 mm |
Width : | 16.69 mm |
Length / Width Ratio : | 1.00 |
Average diameter : | 16.69 mm |
Approx Face-up Area : | 218.84 mm² |
Approx Volume : | 1,086.38 mm³ |
Refractive Index : | 1.744 - 1.755 |
Cleavage : | 1,1 ; 3,2 |
Luster : | Vitreous |
Birefringence : | 0.009 |
Wearability : | Durable gem for daily wear |
Birthstone : | Alexandrite is a birthstone for the month of June |
Before purchasing a diamond, one should make sure it looks its weight. It's important to understand that carat weight does not equal face-up size.
Two diamonds of exactly the same weight (and shape) can vary quite considerably in face-up size. This depends on the proportions of the cut (e.g., deep cuts will face up smaller)..
Face-up area is a measure of the size of the diamond when viewed from the top view.
It tells you how big the diamond is at the girdle plane. It's important for a diamond to have sufficient face-up size for its carat weight
Diamond prices vary greatly as they depend on the combination of unique characteristics (4Cs - Cut, Color, Clarity, and Carat). For best value, it's important to choose the combination that will reduce the price without having a negative impact on appearance.
You also need to consider some of the following points as well
- Strong blue fluorescence.
- Fair or Poor symmetry.
- Extremely thin or extremely thick girdle.
- Inclusions visible to the naked eye.
- Diamond Certification.
Blue fluorescence can have a positive, negative, or zero effect on a diamond. Diamonds in the lower color range (H or lower) can benefit from it, as it can make them look whiter, more colorless. On the other hand, strong fluorescence can cause a stone (especially in the higher color range D-G) to appear hazy or milky under certain light conditions. One of the biggest benefits of fluorescent diamonds is that they generally cost less.
Blue fluorescence can be found in 35% of naturally mined diamonds and it makes the stone glow under UV light. Outside of UV lighting environments, there are no visual differences between fluorescent and non-fluorescent diamonds.
However, there exists a big difference in pricing between these diamonds. In the industry, diamonds with fluorescence are usually traded at a 10-15% discount and can go as high as 25% for higher colored diamonds.
GIA grades fluorescence as None, Faint, Medium, Strong, and Very Strong.
There are Many Laboratory Available which provides certification for Gemstones.
- GIA - Gemological Institute of America
- AGS - American Gemological Society
- HRD - The Hoge Raad voor Diamant
- IGI - International Gemological Institute
- EGL - European Gemological Laboratories
- GSI - Gemological Science International
*Different certification labs give different results
Piecut Diamonds are set of small Diamonds, which are cut & polished with Precised Measurements to look like a Single Solitaire diamond which can save 80% to 85% from Solitaire Single Piece Price.
Shapes of Pie Cut Diamonds.
- 9 Pcs Emerald
- 9 Pcs Round
- 4 Pcs Round
- 3 Pcs Heart
- 4 Pcs Oval
- 4 Pcs Pear
- 4 Pcs Marquise
- 5 Pcs Star
Click here for More Information
8.90 ct - Round - Alexandrite
7.40 ct - Round - Alexandrite
5.90 ct - Round - Alexandrite
17.30 ct - Round - Alexandrite
12.40 ct - Round - Alexandrite
17.30 ct - Round - Alexandrite
27.40 ct - Round - Alexandrite
20.30 ct - Round - Alexandrite
25.30 ct - Round - Alexandrite
37.60 ct - Round - Alexandrite
33.20 ct - Round - Alexandrite
33.30 ct - Round - Alexandrite
7.40 ct - Round - Alexandrite
5.90 ct - Round - Alexandrite
17.30 ct - Round - Alexandrite
12.40 ct - Round - Alexandrite
17.30 ct - Round - Alexandrite
27.40 ct - Round - Alexandrite
20.30 ct - Round - Alexandrite
25.30 ct - Round - Alexandrite
37.60 ct - Round - Alexandrite
33.20 ct - Round - Alexandrite
33.30 ct - Round - Alexandrite
8.60 ct - Diaspore - Emerald
1.90 ct - Morganite - Marquise
2.40 ct - Ruby - Oval
9.40 ct - Hiddenite - Marquise
8.50 ct - Chrysoberyl - Marquise
7.60 ct - Fluorite - Baguette
12.80 ct - Alexandrite - Emerald
17.80 ct - Chrysoberyl - Pear
18.40 ct - Sapphire - Marquise
10.70 ct - Amethyst - Round
13.30 ct - Apatite - Trillion
15.40 ct - Emerald - Trillion
24.40 ct - Sinhalite - Trillion
25.40 ct - Quartz - Princess
29.90 ct - Sapphire - Trillion
22.00 ct - Hiddenite - Oval
26.70 ct - Chrysoberyl - Marquise
28.60 ct - Peridot - Baguette
32.10 ct - Quartz - Emerald
39.10 ct - Andesine - Baguette
33.20 ct - Ruby - Marquise
39.70 ct - Peridot - Pear
32.70 ct - Aquamarine - Baguette
34.50 ct - Benitoite - Princess
V S
1.90 ct - Morganite - Marquise
2.40 ct - Ruby - Oval
V S
9.40 ct - Hiddenite - Marquise
8.50 ct - Chrysoberyl - Marquise
V S
7.60 ct - Fluorite - Baguette
12.80 ct - Alexandrite - Emerald
V S
17.80 ct - Chrysoberyl - Pear
18.40 ct - Sapphire - Marquise
V S
10.70 ct - Amethyst - Round
13.30 ct - Apatite - Trillion
V S
15.40 ct - Emerald - Trillion
24.40 ct - Sinhalite - Trillion
V S
25.40 ct - Quartz - Princess
29.90 ct - Sapphire - Trillion
V S
22.00 ct - Hiddenite - Oval
26.70 ct - Chrysoberyl - Marquise
V S
28.60 ct - Peridot - Baguette
32.10 ct - Quartz - Emerald
V S
39.10 ct - Andesine - Baguette
33.20 ct - Ruby - Marquise
V S
39.70 ct - Peridot - Pear
32.70 ct - Aquamarine - Baguette
V S
34.50 ct - Benitoite - Princess
3.30 ct - Oval- Diamond
7.10 ct - Trillion- Diamond
6.50 ct - Princess- Diamond
7.50 ct - Round- Diamond
5.00 ct - Cushion- Diamond
6.70 ct - Baguette- Diamond
17.40 ct - Baguette- Diamond
16.50 ct - Emerald- Diamond
13.80 ct - Cushion- Diamond
17.30 ct - Baguette- Diamond
17.30 ct - Trillion- Diamond
16.70 ct - Cushion- Diamond
26.70 ct - Marquise- Diamond
25.30 ct - Princess- Diamond
26.60 ct - Marquise- Diamond
27.10 ct - Trillion- Diamond
25.70 ct - Pear- Diamond
26.00 ct - Princess- Diamond
38.80 ct - Emerald- Diamond
37.30 ct - Baguette- Diamond
35.30 ct - Marquise- Diamond
37.80 ct - Baguette- Diamond
31.50 ct - Marquise- Diamond
38.80 ct - Marquise- Diamond
V S
7.10 ct - Trillion- Diamond
6.50 ct - Princess- Diamond
V S
7.50 ct - Round- Diamond
5.00 ct - Cushion- Diamond
V S
6.70 ct - Baguette- Diamond
17.40 ct - Baguette- Diamond
V S
16.50 ct - Emerald- Diamond
13.80 ct - Cushion- Diamond
V S
17.30 ct - Baguette- Diamond
17.30 ct - Trillion- Diamond
V S
16.70 ct - Cushion- Diamond
26.70 ct - Marquise- Diamond
V S
25.30 ct - Princess- Diamond
26.60 ct - Marquise- Diamond
V S
27.10 ct - Trillion- Diamond
25.70 ct - Pear- Diamond
V S
26.00 ct - Princess- Diamond
38.80 ct - Emerald- Diamond
V S
37.30 ct - Baguette- Diamond
35.30 ct - Marquise- Diamond
V S
37.80 ct - Baguette- Diamond
31.50 ct - Marquise- Diamond
V S
38.80 ct - Marquise- Diamond