This navette or marquise-cut tanzanite is longer and thinner in shape than most marquise cuts. The points also don't seem to align. Photo by Wiener Edelstein Zentrum. Licensed under CC By-SA 3.0.
Article: An Introduction to Fancy Gem Cuts
Credit: Wiener Edelstein Zentrum
|Gemstone||Tanzanite (Zoisite), Zoisite|
|Natural or man made||Natural|