Gahnite
at-auction$ 20
- Locality
- Kagoro, Kaduna State, Nigeria
- Minerals
- Gahnite
- Dimensions
- 0.8 x 0.7 x 0.6 cm
- Size class
- Thumbnail
- SID
- CT876
Transparent blue Gahnite crystal, the zinc rich end member and one of the rarer species in the Spinel group of minerals. It's an octahedron with some damage, but good sized and the color is superb. Translucent to transparent crystal. These were first discovered in 2001 and are found mostly of industrial quality. Though they don't get very large, the color is spectacular. The GIA has written a nice article about these crystals published in Gems & Gemology, Fall 2019, Vol. 55, No. 3.