With its bright iridescence, a well-cut fire agate can resemble high-quality opal. "Fire agate flickr eyes," photo by Jessa and Mark Anderson. Licensed under CC By 2.0.
Article: Opal Simulants: How to Spot Imitation Opal
Credit: Jessa and Mark Anderson
|Gemstone||AgateChalcedony, Fire Agate, Quartz,|
|Natural or man made||Natural|