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Sardonyx has a Sard base, typically of brown or black, with bands of white Onyx running through it. Sard is not Onyx, but rather a dark variety of ...

Spinel is a hard vitreous magnesium aluminum oxide, and comes in a range of other colors, but those varieties are transparent. Black Spinel not onl...

Perfect for gift giving or keeping for yourself, these gemstone specimens come conveniently packed in a clear plastic terrarium that serves as prot...

Perfect for gift giving or keeping for yourself, these gemstone specimens come conveniently packed in a clear plastic terrarium that serves as prot...

Perfect for gift giving or keeping for yourself, these gemstone specimens come conveniently packed in a clear plastic terrarium that serves as prot...

Perfect for gift giving or keeping for yourself, these gemstone specimens come conveniently packed in a clear plastic terrarium that serves as prot...

These Black Tourmaline rock specimens will be a great addition to your rock collection! They have a deep, inky black color to them and depending on...

These Black Tourmaline rock specimens will be a great addition to your rock collection! They have a deep, inky black color to them and depending on...

Whether you're drawn to it's properties or you are a collector of cool rocks, this Black Opal specimen is a must-have. This is remarkable gemstone ...