rock-it

Carrolite - Kamoya II Mine, Congo

Pentagonite

Elbaite on quartz

Apopholite

Tourmaline with lepidolite and albite var cleavelandite | Minas Gerais, Brazil, South America

Cuprian Smithsonite from Tsumeb Mine, Namibia

Cualstibite-1M, Azurite - The unusual colour is caused by minor contents of Fe.

Hematite X formed (1,5mm), covered with Cristobalite.  photo / collection: Fred Kruijen

"This mosaic of 53 images was recorded by the Jupiter-bound Galileo spacecraft as it passed near our own large natural satellite in 1992. The pictures were recorded through three spectral filters and combined in an exaggerated false-color scheme to explore the composition of the lunar surface as changes in mineral content produce subtle color differences in reflected light."

Rhodochrosite with Quartz from Sweet Home Mine, Buckskin Gulch, Alma District, Park County, Colorado

A close up of the 59.6 ct Pink Star Diamond (formerly called the Steinmetz Pink) that was sold for 83M USD in Nov 2013.

Contra Luz Opal - 2,290 CARATS Opal Butte, Morrow Co., Oregon, USA

Opal

Opal.  Virgin Valley, Humboldt County, Nevada, USA.