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Autunite is a secondary mineral associated with uraninite

A Rough Piece of Boulder Opal from Australia

Koroit Opal Nut Conglomerate, Australia

Koroit Opal Matrix, Australia

Boulder Opal from the Quilpie Opal Mining Area, Queensland, Australia

Opal Name Determined by Base Color: Black Opal

Pictures of Opal - Black, Fire, Boulder, Rough, Jelly, Crystal

Red Beryl (Wah Wah Mountains Beaver County, Utah)

Flawless copper paraiba tourmeline

Electronics, Cars, Fashion, Collectibles, Coupons and More | eBay

"Crystals and gems are revered and collected for their physical beauty and monetary value and this Opal Butte crystal with contra luz color is no exception. The stunning gemstone, like many opals, features a varied spectrum of colors, but what separates it from the others is its spectacular visual effect. It looks like an underwater view of the ocean floor as light shines through it. There's a surreal quality about the gemstone that looks like a pocket-sized aquarium."

Koroit Boulder Opal

Hollow and etched Rubellite / Mineral Friends ♥

2.5" See Thru Sky Blue BARITE Sharp Glassy Terminated Crystals Morocco / Mineral Friends♥

Quartz circle / Mineral Friends

Quartz var. Amethyst Quartz. Stowe Maine / Mineral Friends ♥