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Turquoise and Ruby look-alikes

Turquoise (CuAl6(PO4)4(OH)8·4H2O) and Ruby (Al2O3:Cr)

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Several rocks and minerals can be confused with Turquoise and Ruby. Below are documented look-alikes and the features that tell them apart. Never rely on a single feature. Always check multiple properties.

Similar rocks to compare

Chrysocolla

Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (x<1)

Also known as: Copper silicate

Variscite

AlPO4·2H2O

Also known as: Utahlite

Azurite

Cu3(CO3)2(OH)2

Also known as: Chessylite

Garnet (Pyrope/Almandine)

Mg3Al2(SiO4)3 / Fe3Al2(SiO4)3

Also known as: Red Garnet

Spinel (Red)

MgAl2O4

Also known as: Balas Ruby

Red Tourmaline (Rubellite)

Complex borosilicate

Also known as: Rubellite

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