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Pearl, Half Drilled, Drop, 6 x 8 / 7 x 9 mm
- 8111451
- £4.60 exc.VAT
Most pearls are products of bivalve mollusks mainly of the oyster type. They are built up of mother-of-pearl which is mainly calcium carbonate that binds the microcrystals concentrically around an irritant. The size of pearls varies between a pin head and a pigeon's egg. One of the largest pearls ever found is 2inches long and weighs 454ct (90.8grams), it is in the South Kensington Museum in London.
Shape: Drop
Size: 6x8mm & 7x9mm
Weight: 0.48grams
Colour: White shiny
Moh's hardness: 2½ - 4½
Density: 2.60-2.85
Cleavage: None
Refractive index: 1.52-1.66
Dispersion: None
