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Nigerian Blue Spinel February 6, 2019 · 9 specimens Another update of Nigerain Spinel crystals that have fantastic blue coloration. They don't get large but the color saturation is outstanding. These also have a high Zinc content. Analyses has shown them to be 94% Gahnite (ZnAl2O4), the zinc rich member of the Spinel group. |
J103 - Spinel sold
Kagoro, Kaduna State, Nigeria
Thumbnail - 0.7 x 0.7 x 0.6 cm
Single octahedral crystal of cobalt blue Spinel. Chipping along one edge, otherwise a perfect octahedron with slight edge wear. Translucent to transparent crystal.
J104 - Spinel sold
Kagoro, Kaduna State, Nigeria
Thumbnail - 0.8 x 0.7 x 0.7 cm
Single octahedral crystal of cobalt blue Spinel. Chipping along two edges, otherwise a perfect octahedron with slight edge wear. Translucent to transparent crystal.
J107 - Spinel sold
Kagoro, Kaduna State, Nigeria
Thumbnail - 0.5 x 0.5 x 0.5 cm
Single octahedral crystal of cobalt blue Spinel. Tiny chip on one tip, otherwise a perfect octahedron with slight edge wear. Transparent crystal of facet quality.
J110 - Spinel sold
Kagoro, Kaduna State, Nigeria
Thumbnail - 0.6 x 0.6 x 0.6 cm
Single octahedral crystal of cobalt blue Spinel. Chipping on two tips, otherwise a perfect octahedron with slight edge wear. Good transparency.
J111 - Spinel sold
Kagoro, Kaduna State, Nigeria
Thumbnail - 0.9 x 0.9 x 0.7 cm
Single octahedral crystal of cobalt blue Spinel. Damage to one tip, otherwise a perfect octahedron with slight edge wear. Great color and transparency to this one.
J113 - Spinel sold
Kagoro, Kaduna State, Nigeria
Thumbnail - 0.8 x 0.8 x 0.6 cm
Single octahedral crystal of cobalt blue Spinel. Though two tips are damaged, it has very little edge wear and good surface luster. Translucent to transparent crystal.
J115 - Spinel sold
Kagoro, Kaduna State, Nigeria
Thumbnail - 0.7 x 0.7 x 0.7 cm
Single octahedral crystal of cobalt blue Spinel. Damage to two tips but little edge wear and good transparency.
J116 - Spinel sold
Kagoro, Kaduna State, Nigeria
Thumbnail - 0.8 x 0.7 x 0.7 cm
Single octahedral crystal of cobalt blue Spinel. Chipping on two tips, otherwise a perfect octahedron with slight edge wear. Translucent to transparent crystal.
J118 - Spinel sold
Kagoro, Kaduna State, Nigeria
Thumbnail - 0.7 x 0.7 x 0.6 cm
Single octahedral crystal of cobalt blue Spinel. Chipping on two tips, otherwise a perfect octahedron with slight edge wear. Translucent to transparent crystal.