A neat 75% pure gold (or 750 parts pure gold and 250 parts other metals) More gold Blue is the best-known colour for this gemstone but it can be found in all colours of the spectrum. After diamond, sapphire is the hardest gemstone.
More and A precious, lustrous gemstone made of highly compressed carbon. Diamonds are one of the hardest materials known to mankind. Colours of diamonds range from colourless, yellow, orange and brown to almost black. Natural coloured (or ‘fancy’) diamonds can be extremely rare. The cut, colour, clarity and carat weight of a diamond are the criteria jewellers use... More ring in the Jewellery made in the Art Deco era (1920-1935). More style. The sapphire is a lovely cornflower blue colour and originated in Sri Lankan (Ceylon was the country's former name until 1972) More. It is complimented by a French for “rod.” A step-cut used for narrow, rectangular faceted stones, mainly those of a small size. More diamond on either side. It would make a pretty engagement ring.