Ornamental stones

Chemical composition Chemical composition (in%): K2O from 7.0 to 10.3, MgO from 21.4

Obsidian Type Hard block Requirements No Gravity active No Transparency No Luminosity No

Slate rock: description, origin, properties Slate rock photo Slate is a rock,

Tourmaline quartz is called “hairy”, like rutile. However, unlike his namesake, he

In the previous article we looked at general information about what coral is

It has been known for more than 6,000 years and has over 150 varieties. Rich palette

History of the mineral Albit is one of the few minerals whose “parents”, history of name and date

Description and characteristics of diopside The stone, known since ancient times, has a Greek name. It happened

Category Oxides and hydroxides Name in English. Hematite Formula Fe2O3 Group Corundum Group Color

Jewelry stones and gems are valued for their transparency, ability to refract light, or for their beautiful