Gahnite
at-auction$ 20
- Locality
- Kagoro, Kaduna State, Nigeria
- Minerals
- Gahnite
- Dimensions
- 0.8 x 0.7 x 0.7 cm
- Size class
- Thumbnail
- SID
- CT873
Transparent blue Gahnite crystal, the zinc rich end member and one of the rarer species in the Spinel group of minerals. It's a complete octahedron with slight damage to a few tips. Translucent to transparent crystal, a good sized, sharply formed example for the find. 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.