Diamonds are a hard crystalline form of carbon. These uncut diamonds are from the Russian State Precious Metals and Gemstones Collection Fund, part of the Russian Finance Ministry. Photographed in Moscow, in March
A bright and shining cornflower blue, natural, no-heat Ceylon sapphire - weighing an ample carats - glistens and glows from within a newly-made and substantial platinum and diamond mounting, fashioned with finely-scrolled openwork.
This singular and sensational modern diamond ring radiates with a masterfully cut carat 'Pentagonal Modern Brilliant' diamond, accompanied with a grading certificate from the GIA - Gem Trade Laboratory - stating: 'Natural Fancy Dark Brown Greenish
A gemstone is usually pictured as being one color; a red ruby or green emerald or a white diamond. But here we are reminded that a gemstone often contains a rainbow of additional overlooked colors in its starkly geometric facets.