Topaz (18.20 Carat )
27.11 x 13.55 mm
Stone Type : | Topaz |
Stone Shape : | Marquise |
Stone Weight : | 18.20 carat |
Length X Width : | 27.11 x 13.55 mm |
Length / Width Ratio : | 2.00 |
Approx Face-up Area : | 260.88 mm² |
Approx Volume : | 1,031.17 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 : | Marquise |
Chemical Formula : | Al2SiO4(F,OH)2 |
Crystal Structure : | Orthorhombic |
Hardness : | 8 |
Specific Gravity : | 3.53 |
Carat weight : | 18.20 carat |
Gram weight : | 3.640 gm |
Ounces weight : | 0.1284 ounces |
Length : | 27.11 mm |
Width : | 13.55 mm |
Length / Width Ratio : | 2.00 |
Average diameter : | 20.33 mm |
Approx Face-up Area : | 260.88 mm² |
Approx Volume : | 1,031.17 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
5.20 ct - Marquise - Topaz
8.40 ct - Marquise - Topaz
2.60 ct - Marquise - Topaz
15.20 ct - Marquise - Topaz
16.80 ct - Marquise - Topaz
18.50 ct - Marquise - Topaz
27.30 ct - Marquise - Topaz
27.30 ct - Marquise - Topaz
28.20 ct - Marquise - Topaz
31.40 ct - Marquise - Topaz
37.10 ct - Marquise - Topaz
30.70 ct - Marquise - Topaz
8.40 ct - Marquise - Topaz
2.60 ct - Marquise - Topaz
15.20 ct - Marquise - Topaz
16.80 ct - Marquise - Topaz
18.50 ct - Marquise - Topaz
27.30 ct - Marquise - Topaz
27.30 ct - Marquise - Topaz
28.20 ct - Marquise - Topaz
31.40 ct - Marquise - Topaz
37.10 ct - Marquise - Topaz
30.70 ct - Marquise - Topaz
9.40 ct - Hiddenite - Pear
6.30 ct - Andesine - Round
9.20 ct - Beryl - Emerald
6.80 ct - Andesine - Baguette
4.40 ct - Spinel - Marquise
2.10 ct - Sapphire - Emerald
13.50 ct - Sinhalite - Princess
17.70 ct - Apatite - Marquise
16.20 ct - Tanzanite - Oval
18.00 ct - Sapphire - Emerald
10.50 ct - Sinhalite - Baguette
15.40 ct - Tanzanite - Cushion
28.70 ct - Tanzanite - Emerald
25.80 ct - Aquamarine - Marquise
24.60 ct - Benitoite - Round
25.60 ct - Hiddenite - Cushion
29.80 ct - Ruby - Oval
22.20 ct - Sinhalite - Marquise
40.00 ct - Peridot - Emerald
36.20 ct - Amethyst - Baguette
31.80 ct - Emerald - Marquise
35.90 ct - Citrine - Round
33.70 ct - Beryl - Round
37.00 ct - Peridot - Pear
V S
6.30 ct - Andesine - Round
9.20 ct - Beryl - Emerald
V S
6.80 ct - Andesine - Baguette
4.40 ct - Spinel - Marquise
V S
2.10 ct - Sapphire - Emerald
13.50 ct - Sinhalite - Princess
V S
17.70 ct - Apatite - Marquise
16.20 ct - Tanzanite - Oval
V S
18.00 ct - Sapphire - Emerald
10.50 ct - Sinhalite - Baguette
V S
15.40 ct - Tanzanite - Cushion
28.70 ct - Tanzanite - Emerald
V S
25.80 ct - Aquamarine - Marquise
24.60 ct - Benitoite - Round
V S
25.60 ct - Hiddenite - Cushion
29.80 ct - Ruby - Oval
V S
22.20 ct - Sinhalite - Marquise
40.00 ct - Peridot - Emerald
V S
36.20 ct - Amethyst - Baguette
31.80 ct - Emerald - Marquise
V S
35.90 ct - Citrine - Round
33.70 ct - Beryl - Round
V S
37.00 ct - Peridot - Pear
7.60 ct - Cushion- Diamond
9.60 ct - Pear- Diamond
2.80 ct - Round- Diamond
5.30 ct - Emerald- Diamond
8.40 ct - Round- Diamond
6.20 ct - Marquise- Diamond
18.40 ct - Pear- Diamond
11.40 ct - Cushion- Diamond
17.00 ct - Baguette- Diamond
17.20 ct - Marquise- Diamond
16.30 ct - Pear- Diamond
15.00 ct - Pear- Diamond
26.80 ct - Marquise- Diamond
25.10 ct - Baguette- Diamond
23.60 ct - Trillion- Diamond
27.30 ct - Oval- Diamond
21.80 ct - Cushion- Diamond
23.90 ct - Oval- Diamond
32.80 ct - Baguette- Diamond
35.20 ct - Baguette- Diamond
38.80 ct - Oval- Diamond
37.20 ct - Oval- Diamond
37.70 ct - Cushion- Diamond
31.00 ct - Cushion- Diamond
V S
9.60 ct - Pear- Diamond
2.80 ct - Round- Diamond
V S
5.30 ct - Emerald- Diamond
8.40 ct - Round- Diamond
V S
6.20 ct - Marquise- Diamond
18.40 ct - Pear- Diamond
V S
11.40 ct - Cushion- Diamond
17.00 ct - Baguette- Diamond
V S
17.20 ct - Marquise- Diamond
16.30 ct - Pear- Diamond
V S
15.00 ct - Pear- Diamond
26.80 ct - Marquise- Diamond
V S
25.10 ct - Baguette- Diamond
23.60 ct - Trillion- Diamond
V S
27.30 ct - Oval- Diamond
21.80 ct - Cushion- Diamond
V S
23.90 ct - Oval- Diamond
32.80 ct - Baguette- Diamond
V S
35.20 ct - Baguette- Diamond
38.80 ct - Oval- Diamond
V S
37.20 ct - Oval- Diamond
37.70 ct - Cushion- Diamond
V S
31.00 ct - Cushion- Diamond