Alexandrite (18.10 Carat )
![](../images/shapes/size410/pear_selected.png)
22.36 x 13.47 mm
Stone Type : | Alexandrite |
Stone Shape : | Pear |
Stone Weight : | 18.10 carat |
Length X Width : | 22.36 x 13.47 mm |
Length / Width Ratio : | 1.66 |
Approx Face-up Area : | 219.85 mm² |
Approx Volume : | 978.28 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 ,
![Red](../images/colors/pear___red.png)
![Dark Red](../images/colors/pear___dark_red.png)
![Light Brown](../images/colors/pear___light_brown.png)
![Brown](../images/colors/pear___brown.png)
![Dark Brown](../images/colors/pear___dark_brown.png)
![Light Yellowish Green](../images/colors/pear___light_yellowish_green.png)
![Yellowish Green](../images/colors/pear___yellowish_green.png)
![Dark Yellowish Green](../images/colors/pear___dark_yellowish_green.png)
![Light Green](../images/colors/pear___light_green.png)
![Green](../images/colors/pear___green.png)
![Dark Green](../images/colors/pear___dark_green.png)
![Light Bluish Green](../images/colors/pear___light_bluish_green.png)
![Bluish Green](../images/colors/pear___bluish_green.png)
![Dark Bluish Green](../images/colors/pear___dark_bluish_green.png)
![Light Violet](../images/colors/pear___light_violet.png)
![Violet](../images/colors/pear___violet.png)
![Dark Violet](../images/colors/pear___dark_violet.png)
![Light Purple](../images/colors/pear___light_purple.png)
![Purple](../images/colors/pear___purple.png)
![Dark Purple](../images/colors/pear___dark_purple.png)
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 : | Pear |
Chemical Formula : | BeAl2O4 |
Crystal Structure : | Orthorhombic |
Hardness : | 8.5 |
Specific Gravity : | 3.7 |
Carat weight : | 18.10 carat |
Gram weight : | 3.620 gm |
Ounces weight : | 0.1277 ounces |
Length : | 22.36 mm |
Width : | 13.47 mm |
Length / Width Ratio : | 1.66 |
Average diameter : | 17.91 mm |
Approx Face-up Area : | 219.85 mm² |
Approx Volume : | 978.28 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
7.70 ct - Pear - Alexandrite
7.10 ct - Pear - Alexandrite
5.70 ct - Pear - Alexandrite
10.00 ct - Pear - Alexandrite
16.50 ct - Pear - Alexandrite
19.50 ct - Pear - Alexandrite
26.10 ct - Pear - Alexandrite
27.10 ct - Pear - Alexandrite
22.00 ct - Pear - Alexandrite
35.20 ct - Pear - Alexandrite
39.60 ct - Pear - Alexandrite
38.20 ct - Pear - Alexandrite
7.10 ct - Pear - Alexandrite
5.70 ct - Pear - Alexandrite
10.00 ct - Pear - Alexandrite
16.50 ct - Pear - Alexandrite
19.50 ct - Pear - Alexandrite
26.10 ct - Pear - Alexandrite
27.10 ct - Pear - Alexandrite
22.00 ct - Pear - Alexandrite
35.20 ct - Pear - Alexandrite
39.60 ct - Pear - Alexandrite
38.20 ct - Pear - Alexandrite
8.50 ct - Ruby - Pear
9.30 ct - Benitoite - Marquise
6.90 ct - Quartz - Round
9.90 ct - Quartz - Round
1.10 ct - Amethyst - Cushion
5.80 ct - Andesine - Emerald
16.60 ct - Hiddenite - Emerald
13.70 ct - Alexandrite - Trillion
10.00 ct - Alexandrite - Cushion
19.70 ct - Peridot - Trillion
14.60 ct - Hiddenite - Cushion
14.50 ct - Amethyst - Baguette
30.00 ct - Diopside - Oval
28.60 ct - Citrine - Pear
28.30 ct - Emerald - Marquise
20.10 ct - Chrysoberyl - Oval
24.70 ct - Diamond - Trillion
24.60 ct - Kunzite - Cushion
36.90 ct - Tanzanite - Princess
37.40 ct - Kunzite - Round
39.40 ct - Citrine - Emerald
30.10 ct - Citrine - Baguette
35.20 ct - Peridot - Princess
32.90 ct - Tanzanite - Oval
V S
9.30 ct - Benitoite - Marquise
6.90 ct - Quartz - Round
V S
9.90 ct - Quartz - Round
1.10 ct - Amethyst - Cushion
V S
5.80 ct - Andesine - Emerald
16.60 ct - Hiddenite - Emerald
V S
13.70 ct - Alexandrite - Trillion
10.00 ct - Alexandrite - Cushion
V S
19.70 ct - Peridot - Trillion
14.60 ct - Hiddenite - Cushion
V S
14.50 ct - Amethyst - Baguette
30.00 ct - Diopside - Oval
V S
28.60 ct - Citrine - Pear
28.30 ct - Emerald - Marquise
V S
20.10 ct - Chrysoberyl - Oval
24.70 ct - Diamond - Trillion
V S
24.60 ct - Kunzite - Cushion
36.90 ct - Tanzanite - Princess
V S
37.40 ct - Kunzite - Round
39.40 ct - Citrine - Emerald
V S
30.10 ct - Citrine - Baguette
35.20 ct - Peridot - Princess
V S
32.90 ct - Tanzanite - Oval
1.60 ct - Cushion- Diamond
4.80 ct - Oval- Diamond
9.10 ct - Oval- Diamond
3.00 ct - Emerald- Diamond
5.00 ct - Emerald- Diamond
4.10 ct - Princess- Diamond
17.70 ct - Princess- Diamond
13.70 ct - Marquise- Diamond
15.00 ct - Princess- Diamond
15.10 ct - Baguette- Diamond
19.90 ct - Emerald- Diamond
10.40 ct - Trillion- Diamond
29.90 ct - Marquise- Diamond
29.70 ct - Oval- Diamond
20.30 ct - Round- Diamond
29.40 ct - Marquise- Diamond
24.40 ct - Princess- Diamond
26.10 ct - Cushion- Diamond
39.50 ct - Emerald- Diamond
36.50 ct - Round- Diamond
39.50 ct - Emerald- Diamond
32.90 ct - Baguette- Diamond
34.60 ct - Trillion- Diamond
38.10 ct - Princess- Diamond
V S
4.80 ct - Oval- Diamond
9.10 ct - Oval- Diamond
V S
3.00 ct - Emerald- Diamond
5.00 ct - Emerald- Diamond
V S
4.10 ct - Princess- Diamond
17.70 ct - Princess- Diamond
V S
13.70 ct - Marquise- Diamond
15.00 ct - Princess- Diamond
V S
15.10 ct - Baguette- Diamond
19.90 ct - Emerald- Diamond
V S
10.40 ct - Trillion- Diamond
29.90 ct - Marquise- Diamond
V S
29.70 ct - Oval- Diamond
20.30 ct - Round- Diamond
V S
29.40 ct - Marquise- Diamond
24.40 ct - Princess- Diamond
V S
26.10 ct - Cushion- Diamond
39.50 ct - Emerald- Diamond
V S
36.50 ct - Round- Diamond
39.50 ct - Emerald- Diamond
V S
32.90 ct - Baguette- Diamond
34.60 ct - Trillion- Diamond
V S
38.10 ct - Princess- Diamond