Common Opal

Opal is a hydrated form of Silica. Opals water content can be as high as 21% by weight which can make it stress fracture as it dries. The water Content is usually between 6% and 10%. Because of it's amorphous character, it is classed as a mineraloid, Crystalline forms of silica on the other hand are classed as minerals.  

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Pink Peruvian Opal Square Silver Pendant

This pendant is 21mm (.85") Chain not included.

Peruvian Pink Opal Square Silver Pendant

This pendant has 2 squares The large square is about 1" the small square is 1/3" There are also 4 small pink CZ

Cinnabar Colored Opal Silver Pendant

This pendant is 30x24mm (1.18" x .96") Chain not included.

Arizona Southern Skies Blue Opal Silver Earrings

These earrings are 47x14mm (1.85"x.55")The top part has citrine stones and the overall size is 10x12mm