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Blue Opal in Host Rock look-alikes

Opal (SiO2·nH2O) in host rock

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Several rocks and minerals can be confused with Blue Opal in Host Rock. 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

CuSiO3·nH2O

Also known as: Gem Silica (when pure and translucent)

Turquoise

CuAl6(PO4)4(OH)8·4H2O

Also known as: Callais

Chalcedony (Blue)

SiO2

Also known as: Blue Lace Agate, Mohave Blue

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