Opal look-alikes
Opal
Got a photo? Identify rocks instantly with the Rockby app
Open the appSeveral rocks and minerals can be confused with 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
Chalcedony
Chalcedony (SiO2)
Also known as: Agate, Jasper, Carnelian, Onyx
Quartz
Quartz (SiO2)
Also known as: Amethyst, Citrine, Rose Quartz
Glass
Amorphous Silica (SiO2)
Also known as: Obsidian (natural glass)
Explore Opal
Identify rocks anywhere
Free on iOS, Android, and Web. Photo identification, full database, and your personal collection.