Pearl Half Drilled Round, 8 - 9 mm
- 8111437
- £3.00 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: Pearl Half-Drilled
Size: 8x9mm
Weight: 0.67grams
Colour: Mixed: White, Pink, Red, Dark Purple
Moh's hardness: 2½ - 4½
Density: 2.60-2.85
Cleavage: None
Refractive index: 1.52-1.66
Dispersion: None