Topaz (20.90 Carat )
19.92 x 13.28 mm
Stone Type : | Topaz |
Stone Shape : | Baguette |
Stone Weight : | 20.90 carat |
Length X Width : | 19.92 x 13.28 mm |
Length / Width Ratio : | 1.50 |
Approx Face-up Area : | 264.54 mm² |
Approx Volume : | 1,184.15 mm³ |
How many Colors Available for Topaz ?
White , Light Red , Red , Dark Red , Orangey Red , Light Orange , Orange , Light Brown , Brown , Dark Brown , Light Yellow , Yellow , Light Yellowish Green , Yellowish Green , Dark Yellowish Green , Light Green , Green , Dark Green , Light Bluish Green , Bluish Green , Dark Bluish Green , Light Blue , Blue , Dark Blue , Light Violet , Violet , Dark Violet , Light Purple , Purple , Dark Purple , Light Grey , Grey ,
Topaz is a gemstone of many colors. It’s commonly found colorless (white) and then treated to achieve desired colors. Blue Topaz is the most common and popular color variety.
Name of Stone : | Topaz |
Mineral : | Topaz |
Shape : | Baguette |
Chemical Formula : | Al2SiO4(F,OH)2 |
Crystal Structure : | Orthorhombic |
Hardness : | 8 |
Specific Gravity : | 3.53 |
Carat weight : | 20.90 carat |
Gram weight : | 4.180 gm |
Ounces weight : | 0.1474 ounces |
Length : | 19.92 mm |
Width : | 13.28 mm |
Length / Width Ratio : | 1.50 |
Average diameter : | 16.60 mm |
Approx Face-up Area : | 264.54 mm² |
Approx Volume : | 1,184.15 mm³ |
Refractive Index : | 1.610 - 1.638 |
Cleavage : | 1,3 - basal |
Luster : | Vitreous |
Birefringence : | 0.014 |
Wearability : | Very good |
Birthstone : | Topaz is a birthstone for the month of December |
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
6.70 ct - Baguette - Topaz
2.20 ct - Baguette - Topaz
5.80 ct - Baguette - Topaz
17.10 ct - Baguette - Topaz
18.60 ct - Baguette - Topaz
17.30 ct - Baguette - Topaz
26.30 ct - Baguette - Topaz
20.30 ct - Baguette - Topaz
26.20 ct - Baguette - Topaz
30.30 ct - Baguette - Topaz
30.60 ct - Baguette - Topaz
39.40 ct - Baguette - Topaz
2.20 ct - Baguette - Topaz
5.80 ct - Baguette - Topaz
17.10 ct - Baguette - Topaz
18.60 ct - Baguette - Topaz
17.30 ct - Baguette - Topaz
26.30 ct - Baguette - Topaz
20.30 ct - Baguette - Topaz
26.20 ct - Baguette - Topaz
30.30 ct - Baguette - Topaz
30.60 ct - Baguette - Topaz
39.40 ct - Baguette - Topaz
5.40 ct - Alexandrite - Cushion
9.60 ct - Tanzanite - Round
1.40 ct - Apatite - Emerald
7.50 ct - Amethyst - Pear
5.90 ct - Aquamarine - Princess
5.80 ct - Kyanite - Princess
15.90 ct - Quartz - Princess
13.40 ct - Peridot - Marquise
18.90 ct - Diamond - Baguette
15.90 ct - Peridot - Oval
18.50 ct - Aquamarine - Round
11.80 ct - Hiddenite - Princess
23.30 ct - Benitoite - Oval
21.40 ct - Beryl - Baguette
23.50 ct - Kunzite - Princess
29.30 ct - Sapphire - Oval
24.30 ct - Citrine - Baguette
26.40 ct - Emerald - Princess
36.10 ct - Emerald - Round
39.20 ct - Aquamarine - Baguette
35.80 ct - Spinel - Cushion
37.80 ct - Diamond - Emerald
34.40 ct - Quartz - Round
30.70 ct - Sinhalite - Oval
V S
9.60 ct - Tanzanite - Round
1.40 ct - Apatite - Emerald
V S
7.50 ct - Amethyst - Pear
5.90 ct - Aquamarine - Princess
V S
5.80 ct - Kyanite - Princess
15.90 ct - Quartz - Princess
V S
13.40 ct - Peridot - Marquise
18.90 ct - Diamond - Baguette
V S
15.90 ct - Peridot - Oval
18.50 ct - Aquamarine - Round
V S
11.80 ct - Hiddenite - Princess
23.30 ct - Benitoite - Oval
V S
21.40 ct - Beryl - Baguette
23.50 ct - Kunzite - Princess
V S
29.30 ct - Sapphire - Oval
24.30 ct - Citrine - Baguette
V S
26.40 ct - Emerald - Princess
36.10 ct - Emerald - Round
V S
39.20 ct - Aquamarine - Baguette
35.80 ct - Spinel - Cushion
V S
37.80 ct - Diamond - Emerald
34.40 ct - Quartz - Round
V S
30.70 ct - Sinhalite - Oval
7.10 ct - Marquise- Diamond
4.80 ct - Pear- Diamond
6.70 ct - Round- Diamond
2.60 ct - Baguette- Diamond
7.30 ct - Baguette- Diamond
9.80 ct - Round- Diamond
12.90 ct - Pear- Diamond
13.40 ct - Round- Diamond
15.00 ct - Round- Diamond
17.10 ct - Baguette- Diamond
19.10 ct - Oval- Diamond
18.90 ct - Pear- Diamond
25.90 ct - Trillion- Diamond
28.40 ct - Baguette- Diamond
29.80 ct - Princess- Diamond
23.70 ct - Round- Diamond
24.60 ct - Emerald- Diamond
27.30 ct - Cushion- Diamond
33.40 ct - Princess- Diamond
36.60 ct - Trillion- Diamond
35.10 ct - Pear- Diamond
36.50 ct - Round- Diamond
37.60 ct - Round- Diamond
36.30 ct - Oval- Diamond
V S
4.80 ct - Pear- Diamond
6.70 ct - Round- Diamond
V S
2.60 ct - Baguette- Diamond
7.30 ct - Baguette- Diamond
V S
9.80 ct - Round- Diamond
12.90 ct - Pear- Diamond
V S
13.40 ct - Round- Diamond
15.00 ct - Round- Diamond
V S
17.10 ct - Baguette- Diamond
19.10 ct - Oval- Diamond
V S
18.90 ct - Pear- Diamond
25.90 ct - Trillion- Diamond
V S
28.40 ct - Baguette- Diamond
29.80 ct - Princess- Diamond
V S
23.70 ct - Round- Diamond
24.60 ct - Emerald- Diamond
V S
27.30 ct - Cushion- Diamond
33.40 ct - Princess- Diamond
V S
36.60 ct - Trillion- Diamond
35.10 ct - Pear- Diamond
V S
36.50 ct - Round- Diamond
37.60 ct - Round- Diamond
V S
36.30 ct - Oval- Diamond