This is a stunning 18ct75% pure gold (or 750 parts pure gold and 250 parts other metals) More gold heart shaped locket that was made circa 1900-1910. It has been set with red white and blue stones, a RubyOne of the most valuable gemstones on earth. From the corundum family, the red variety being ruby and the blue, sapphire. With the exception of the diamond, corundum is the hardest of the gemstones on the Mohs scale scoring a 9. More, SapphireBlue 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 DiamondA 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. It opens to reveal two compartments for photographs. What a patriotic piece of jewellery to wear!}