Gahnite
at-auction$ 20
- Locality
- Kagoro, Kaduna State, Nigeria
- Minerals
- Gahnite
- Dimensions
- 0.6 x 0.4 x 0.4 cm
- Size class
- Thumbnail
- SID
- K539
Transparent blue Gahnite crystal, the zinc rich end member and one of the rarer species in the Spinel group of minerals. A mostly complete octahedron with chips on the tips of 2 corners. This is a transparent crystal that could possibly cut a nice gemstone. 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.