Blue Chalcedony look-alikes
Chalcedony (a cryptocrystalline variety of Quartz)
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Open the appSeveral rocks and minerals can be confused with Blue Chalcedony. 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
Agate
Agate (SiO2)
Also known as: Banded Chalcedony
Opal
Opal (SiO2·nH2O)
Also known as: Hydrated Amorphous Silica
Turquoise
Turquoise (CuAl6(PO4)4(OH)8·4H2O)
Also known as: Hydrated Copper Aluminum Phosphate
Chrysocolla
Chrysocolla ((Cu,Al)2H2Si2O5(OH)4·nH2O)
Also known as: Hydrated Copper Silicate
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