RUBY Precious Gemstones Libertad 1 Oz Silver Coin Mexico 2023. 31.1 (1 oz). BU, Ruby Dust, 24k Gold. This beautiful 1 Oz pure Silver Coin in the new issue in the “Precious Stones” series and commemorates the Mexican Libertad. The coin is made even more valuable because it is entirely covered with Ruby Dust and 24k Gold Plated. Ruby is a pinkish red to blood-red colored gemstone, a variety of the mineral corundum (aluminium oxide). Ruby is one of the most popular traditional jewelry gems and is very durable. Ruby is one of the traditional cardinal gems, alongside amethyst, sapphire, emerald, and diamond. The word ruby comes from ruber, Latin for red. The color of a ruby is due to the element chromium. Limited mintage of 500 pieces worldwide. This is a PRESALE coin.