Yttrofluorite 2.96cts Cushion Cut 8.40 x 8.40mm Colorado U.S.A H4-4.50 y0195

Yttrofluorite

is a fluorite with an high Yttrium and rare earth content.The formula is (Ca,Y)F2 and hardness 4.5.

An unusual material that conteins over 20% of Yttrium.

From White Cloud Pegmatite, South Platte district, Colorado.

Also weak fluorescent in creamy white-green at short wave.