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E C Austin
One Hundred Years of Artificial Gemstones
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226 Latymer Court absorption agate aluminium amber amethyst AUCTION Australia beryl BIRMINGHAM blue BRACELETS Brooches buyers carats cent Ceylon colourless corundum crystals cultured pearls danburite Dealers density deposits diamond industry Diamond Merchants diggers E.C.I Telephone EXPORT facet garnet gem diamonds Gemmological Gemmological Association Gemmologist gemstones GEMSTONES BY COLOUR glass gold green Hammersmith HATTON GARDEN HIRSCHFELDS HOLBORN Identification of Gemstones important industrial diamonds jade Jewellers jewellery known laboratory LAGAROS Lapidaries light LONDON lustre Manufacturing material metal methods mineral mining N.A.G. Press obtained opal oxide Phone pink Platinum polished PRECIOUS and SEMI-PRECIOUS precious stones produced quartz Rayner recent refractive index refractometer RINGS Robert Webster rock RUBIES SAPPHIRES SAPPHIRES SAPPHIRES EMERALDS Second-hand Jewellery SEMI-PRECIOUS STONES shell silica Silver South Africa specimens spectrum spinel STAR STONES STREET synthetic Telegrams topaz tourmaline trade turquoise Urals variety Whitby x-ray yellow zircon