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Plates Page 1 A view of a gem pit in Ratnapura
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alexandrite astrological blue sapphire buyer carat cat's eye cat's eye effect chatoyancy chrysoberyl chrysoberyl cat's eye Colombo colour change colourless commonly corundum crystal cut and polished cut stones ekanite example export facets found in Sri garnet Gem and Jewellery gem bearing gravel gem cutting gem dealer gem gravels gem industry gem minerals gem mining areas gem quality gem testing instruments gem trade Gem varieties Gemmological gemmologist gemstones gemstones found geuda material geuda stones green heat treatment heavy liquid hessonite illama important Jewellery Authority jewellery industry Jewellery Manufacturing known lapidary light lustre Mama metres Mixed cut moonstone National Gem padmaraga pink Plate polished gemstones produced quartz rare Ratnapura refractive index rock rough diamonds rough stones scapolite shape sinhalite specific gravity spinel Sri Lanka Sri Lanka Gem star effect star sapphire star stones style of cutting surface taaffeite tourmaline translucent to opaque transparent weight zircon