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 : Properties, Formation, Uses and Deposits » Geology Science

Moss Opal: Mineral information, data and localities.

e-Rocks Mineral Auctions

Opal, Properties, Types & Uses

Opal - Wikipedia

Opal-AN (Hyalite Opal) with Carbonate-rich Fluorapatite (var: Staffelite) / Locality - Valec (Waltsch), Bohemia, Czech Republic

Opal: The mineral Opal (black, white, fire) information and pictures

Red Opal Root Chakra Healing Crystals and Stones Rocks Mineral Specimen

Fire Opal: Mineral information, data and localities.

Opal : Properties, Formation, Uses and Deposits » Geology Science

Opal Mineral Information photos and Facts, Manganese Ore

Precious Opal: Mineral information, data and localities.

Rare $675,000 opal makes public debut

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