Gemstones are the main stars in the design of many fine jewellery pieces: sapphire, emerald, topaz, lapis lazuli, amethyst, quartz or peridot are only a few ...Rocks or minerals are called gemstones when they are cut, faceted, and polished to create jewelry or other human adornments after being chosen for their rarity,Most gemstones are hard, but some soft minerals are used in jewelry because of their luster or other physical properties that have aesthetic value. Rarity is ...Chennai has a rich tradition of jewelry making, and you'll likely find a variety of gemstone jewelry options in local stores and from independent jeweler