Boulder Opal look-alikes
Opal in matrix
Got a photo? Identify rocks instantly with the Rockby app
Open the appSeveral rocks and minerals can be confused with Boulder Opal. 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
Black Opal
Hydrated Amorphous Silica (SiO2·nH2O)
Also known as: Precious Black Opal
White Opal
Hydrated Amorphous Silica (SiO2·nH2O)
Also known as: Light Opal
Matrix Opal
Hydrated Amorphous Silica (SiO2·nH2O) within porous host rock
Also known as: Andamooka Matrix Opal
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