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Australian Opal Doublet Cabs Round, 4 mm
- 8111402
- Out of stock - Pre-order Pre-Order
- £4.30 exc.VAT
Doublet Opal
A doublet opal is not a solid opal: doublets are made of thin slices of fine quality opal (generally light opal) glued to a backing piece of black potch, glass or Queensland ironstone, thus resembling natural black opal or Queensland boulder opal
Opal is a highly sought after gemstone due to its rainbow like hues and unique formation. Most commonly found near hot springs and geysers as a result of silica like substances deposited into crevices of rock while water evaporates. Opal is commonly know to be fragile and heat sensitive. Contact with water will also ruin this gemstone. Our two variety's are from Australia and Ethiopia. Other Deposits are found in Czech Republic, Canada, Slovakia, Hungary, Turkey, Indonesia, Brazil, Honduras and Guatemala
Shape: Round
Size: 4 mm
Height: 1.4 mm
Weight: 0.03 grams
Colour: Blue - Multicoloured
Moh's hardness: 5½ - 6½
Density: 1.98 - 2.5
Cleavage: None
Refractive index: 1.37 - 1.52
Dispersion: 0.013 (0.008)
