Carbonates
Dolomite Japlin
Dolomite crystallises in rhombohedral forms, in aggregates with curved faces, in compact masses, granular and cavernous. It can be colourless but can also take on various shades of yellow, grey, pink and brown. it is not very heavy and is easily scratched with a penknife. It dissolves, albeit very slowly and when cold, in hydrochloric acid.
It forms in hydrothermal veins, in carbonate sedimentary rocks and sometimes also within magnesium-rich limestone deposits.
It is used in the iron and steel industry, the chemical and cement industries. Magnesium salts are obtained from dolostone, some of which are then used in medicine.