Riebeckite black crystal on Quartz

Mordenite crystal cluster

Manganite dark mineral crystals

Amblygonite crystals

Autunite crystals

Azurite crystals w Malachite

Stibnite prismatic crystals

zircon crystal 2

Topaz tip of crystal

Halite intergrown hopper crystals

Amazonite crystals

Selenite crystalline variety of gypsum

Cassiterite crystal

Aragonite crystals

Stibnite cluster of prismatic crystals

Selenite gypsum crystal

Luzonite intergrown crystals

Stibnite large spray of silver black prismatic crystals

Aurichalcite crystals close up

Topaz crystal

Ludlamite crystalline crust

Forsterite crystal captured in space by Stardust spacecraft

Grandiderite crystal fragment

Gahnite crystals may be green blue yellow brown or grey