Precious black stones are elegant and strict. They found their application not only in jewelry
Origin of the mineral: features of its formation Like most quartz, heliotrope is a mineral of volcanic
What kind of stone is Black agate? It belongs to minerals, but stands out among its fellows. Useful
Precious blue stones Precious stones are rarely found in nature. Used to make jewelry.
Limestone stone is familiar to everyone: both pliable chalk and durable marble are essentially
Encyclopedia The world around us Granite Granite refers to rocks formed during the solidification of magma.
Look at the sample Factory products always have a standard stamp with a sample. Sample –
Category Carbonates (minerals) Name in English. Malachite Formula Cu2CO3(OH)2 Group Carbonate Group Color Green Color
History The fact that primitive man survived the confrontation with natural elements and predators is
Gold in history The first metal that primitive man found was a nugget of gold. This
