Opal: Mineral information, data and localities.

Although it is still (2007) regarded as a mineral species for historical reasons, opal is not a true mineral in the accepted sense of the word as it is

Opal: Mineral information, data and localities.

Opal Mineral Information photos and Facts, Manganese Ore

Precious opal (Mezezo area, Ethiopia) 6, Precious opal from…

Natural Green Opal Standing Free Forms x 2 From Madagascar

Association between opal occurrences and soil type and regolith type

Opal-C: Mineral information, data and localities.

Moss Opal: Mineral information, data and localities.

Yellow Opal (rare locality) Opal occurrence, Cercle de Nioro du Sahel, Kayes Region, Mali

Opal, Peruvian Blue - Peruvian Blue Opal is a mystical dream the earth has blessed us with. The energy can vary depending on its locality when dealing

Blue Opal - Andean, Rough

Gold Opal: Mineral information, data and localities.

Opal (Common) Gem Guide and Properties Chart

“Opal-AN”) / (variety - “Hyalite Opal”) / (“Blood Vessel Opal”) / Locality - San Luis Potosi, Mexico

Opal - Wikipedia