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More like this: gem stones, opal and asterism.

Minerals, Crystals, etc/

The red variety of the corundum family, ruby has been the world's most valued gemstone for thousands of years and star rubies arguably the most stunning gems, featuring an illuminated star just bellow the surface when cut en cabochon. The star effect is caused due to an optical phenomenon known as "Asterism", when light reflects from needle-like inclusions of rutile aligned perpendicular to the rays of the star.

A great collection of #crystals and their meanings. #crystalmeanings

Crystal Meaning | sTick iT in me (upinyourbrain: crystal meanings chart)

Rough Moonstone sliced to show beautiful irridecence

Rough Welo Ethiopian Opal

Emerald, Rough Gem

Watermelon Tourmaline Crystal Gem Rough Gem Slice, Verdelite and Rubellite

lapidary art - Google Search

Fine crystals of Azurite and Malachite

Aquamarine ~ one of the most beautiful crystals ♥

Crystal Sphere, Raw Points, Clear Crystal Geode Quartz Ball from Brazil 3.88 Inch Inv. 5

White Geode (or obelisk etc) for entry console

Dioptase on Shattuckite in Chrysocolla geode from Namibia