Calipers can provide a very accurate measurement of gemstones. "Measuring a blue topaz" by Mauro Cateb. Licensed under CC BY-SA 3.0.
Blue Topaz Faceted
Calipers can measure gemstones, like this blue topaz, very accurately. Photo by Mauro Cateb. Licensed under CC By-SA 3.0.
Article: How to Spot a Fake Diamond: What These 13 Tests Really Mean!
Credit: Mauro Cateb
| Gemstone | Topaz |
| Natural or man made | Natural |
| Gem State | Faceted |
| Color | Blue |
| Transparency | Transparent |