Tutti Frutti - Ring

Citrine is a variety of the mineral Quartz. It has a pale yellow to brown color. Its hardness is 7 on the Mohs scale, similar to that of emerald.
The main deposits are in Brazil, Madagascar and the former Soviet Union.

Topaz is an aluminum nesosilicate. In its purest form, this stone is colorless. Other elements turn it light blue or golden brown to yellow orange or pink to red.

Topaz is often heated or irradiated to produce a deep blue, orange, light blue, pink or purple color.

It is one of the hardest natural minerals, with a hardness of 8 on the Mohs scale. It is between that of sapphire and emerald in terms of hardness. Topaz can break fairly easily along its fracture lines, though, so it should be treated with caution.

Topaz is mined on every continent. Brazil is the main producer.

Amethyst is a form of mineral quartz. Its color ranges from light to dark purple.

Amethyst's hardness is 7, similar to emerald and tourmaline. Prolonged exposure to the sun can cause the color to fade.

Amethyst occurs worldwide. The main extraction sites are in Brazil,

Until the seventeenth century, it was among the most valuable gemstones along with diamond, ruby emerald and sapphire. After the discovery of large deposits, however, its value dropped. Amethyst today is counted among semi-precious stones.