Translucent blue spinel crystal, the largest and most perfect of the lot. Slight edge/tip damage, but overall very good.

Single octahedral crystal of cobalt blue Spinel. Two tips are damaged, otherwise a perfect octahedron with slight edge wear. Translucent crystal, about as big as these get.

Single octahedral crystal of cobalt blue Spinel. All tips present with very little edge wear. Translucent to transparent crystal.

Single octahedral crystal of cobalt blue Spinel. Only a partial octahedron but it has good transparency.

Single octahedral crystal of cobalt blue Spinel. One tip has a small chip, otherwise a perfect octahedron with slight edge wear. Very transparent.

Single spinel-twinned crystal of cobalt blue Spinel. One tip is missing, the only spinel-twinned crystal of the lot. Highly transparent gem quality crystal.

Single octahedral crystal of cobalt blue Spinel. One tip has a small chip, otherwise a perfect octahedron with slight edge wear. Highly transparent crystal.

Single octahedral crystal of cobalt blue Spinel. Chipping along one edge, otherwise a perfect octahedron with slight edge wear. Translucent to transparent crystal.

Single octahedral crystal of cobalt blue Spinel. Chipping along two edges, otherwise a perfect octahedron with slight edge wear. Translucent to transparent crystal.

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.

Single octahedral crystal of cobalt blue Spinel. Chipping on two tips, otherwise a perfect octahedron with slight edge wear. Good transparency.

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.

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.

Single octahedral crystal of cobalt blue Spinel. Damage to two tips but little edge wear and good transparency.

Single octahedral crystal of cobalt blue Spinel. Chipping on two tips, otherwise a perfect octahedron with slight edge wear. Translucent to transparent crystal.