Mineral are formed in various ways . some kind of MINERAL form under different condition, most mineral required many thousand of the years to develop other MINERAL need just a few years to develop and some of them need only few hours to develop. Minerals who developed in thousand years became precious mineral, meaning of precious gems is hardness of the mineral.

In the mineral Diamond is the most precious mineral , Diamond comes from the carbon family, the hardness of the diamond is 9+, its depend on clarity and the colour, some time you can find a pink diamond with 95% purity & hardness is 9.9 , that is the most precious piece in the world.

After the Diamond, next precious gem is known as Corundum , if red color comes in corundum that known as a Ruby. and when we get 90% clarity and pigeon blood color , And the hardness can go up to the 9.5,that Ruby could be most precious ruby gem in world, in the corundum some time we get naturally mix of Iron that became Sapphire, The color of sapphire is neck peacock blue and hardness of sapphire is 8.6 that could be the most precious sapphire in the world , but some time we get pink, green, red and in several different colours, hardness of the sapphire comes in 8 to 8.6

After the corundum Topaz family come. The hardness of the Topaz is 8 and Topaz come in 3 and 4 different clours, . The best Topaz comes in yellow colour with the honey shade that is the most precious gem of Topaz

After Topaz the Beryl family comes, Greeen Beryl knows as a Emerald, and the hardness of Emerald is 7+, The Best colour of the Emerald is the leave green colour, some time we get upto 95% clearity and the weight upto 10 cts that could be most precious gems of Emerald.

If the Beryl comes less then 7% hardness that can go in many semi precious stones, like AQUAMARINE, TURMALINE , IOLITE AND SODO LITE . in aquamarine you can find many different colours like aqua blue colour is the most precious colour of Aquamarine, then its come in green, Yellow and White colour

Turmaline also comes in many colours you can say all kind of clours comes in turmaline this hardness scale since 1982 by the most this.

After the baryll family Quartz family comes. In Quartz we get tow different kind of colours Pink & White, medically Quartz come for the healing puspose we make the peramids and penduloms, the hardness is the quartz is 6,

After the Quartz family Citrine family comes, in Citrin we are getting many colours like Brandy Citrine, Golden Citrine, Lemon Citrine, Smoky Citrine, Amethyst also comes in the Citrine family, Hardness is 5.6.

After the Citrine Apatide family comes, in the family of Apatide most probably opec stones comes, like Melakite, Agade, Lapiz Turquize, Moon Stone, Onex, Aventurine, Hematite, Blac star , jade, Jusper, Tiger eye.and the hardness of opec family from 3 to 4.7 .