A single blue octahedral spinel with minor matrix attached. Width 11mm. Stack of 140 images. Ex Ted Johnson. Collected in July 1987.
1005 Spinel, Crazy Sphinx Mine, Helena, Helena Mining District, Lewis and Clark Co., Montana, USA
A single blue octahedral spinel with minor matrix attached. Width 11mm. Stack of 140 images. Ex Ted Johnson. Collected in July 1987.
