Mineral Specimen and Product Inventory Search

Availability

Available

Price

$40.00

Locality

Jo Dandy mine, Montrose Co., Colorado, United States

Formula

V⁴⁺O(SO₄)·6H₂O

Size

2.5 x 1.5 x 2.5 cm - Thumbnail

Tagged

vanadium

I suspect that the black crystal grains were formerly Stanleyite, which oxidized and turned black. This happens with valence states of vanadium of plus 4 or 5.