Gahnite
at-auction$ 20
- Locality
- Kagoro, Kaduna State, Nigeria
- Minerals
- Gahnite
- Dimensions
- 0.6 x 0.5 x 0.3 cm
- Size class
- Thumbnail
- SID
- D374
Transparent blue Gahnite crystal, the zinc rich end member and one of the rarer species in the Spinel group of minerals. This is an uncommon spinel-twinned crystal and one of the sharper most perfect crystals I've had of this material. It's also transparent internally aside from some a few small internal imperfections. Undamaged and complete. 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.