9.8" Polished Morado Opal Slab - Central Mexico

Morado opal, also known as purple opal or opal royale, is a variety of common opal found in central Mexico. Morado means "purple" in Spanish, hence the name. Unlike rarer opals it does not exhibit color play (opalescence). The purple coloration is caused by tiny fluorite inclusions within the silica: these inclusions can cause some morado opal to fluoresce blue to violet under shortwave UV light.