Spinel

Spinel is aluminum and magnesium oxide with formula Al2MgO4 the MgO · Al2O3. In it, magnesium can be partially replaced by iron, zinc, manganese or cobalt, aluminum - by iron (trivalent) or chrome.

Character.

Chryzoberyl

Chryzoberyl

Two varieties of this mineral are used in jewelry. One of them - alexandrite - has a color change property that is unique among minerals, depending on the type of light: it has a different color in daylight, and another in an artificial one. The second variety …

Heliodor

Heliodor. Beauty, heliodor is a transparent type of golden-yellow beryllium. This variation, also called golden beryl, has long been known in Ceylon. W 1910 r. in Namibia, a deposit of golden beryl of an exceptionally beautiful color was discovered and given to it …

Akwamaryn (akwamaryna)

Akwamaryn (akwamaryna). Aquamarines are very popular gemstones. They are transparent, blue-green color. This color can be obtained by heating some varieties of beryllium. Darker shades are especially sought after, which, however, never reach the depth of the emerald color. I will name aquamarine …

Emerald

Emerald. Among the noble varieties of beryl, the emerald is the most valued. It is a stone with an intense green color, transparent to translucent.

The ingrowths commonly found in emeralds play a large role in distinguishing natural from synthetic emeralds and from other similar gemstones. Most …

Rubin i szafir

Rubin i szafir – Korund.

Transparent types of corundum are precious gemstones, have been used for ornamental purposes for a very long time. The red variety is called ruby, blue or other - sapphire. Fine crystalline, compact, granular varieties of corundum are used for the purpose …

Famous diamonds

Large and beautiful diamonds have long attracted special attention due to their high value and rarity. They were the subject of separate studies, including. such outstanding mineralogists, like L.. J. Spencer i A. Fersman. Some of them have an interesting history, because …

Diamond mining

Worldwide diamond mining rose to 1975 r. According to the calculations of the French geologist and explorer of the mineral deposits de Launay do 1910 r. mined 142 million carats of diamonds. South Africa accounted for this amount 120 min kr, for Brazil only 1/10 Hello …

Siberian diamonds

Siberian diamonds. The first news about the discovery of diamonds in the Urals comes from before 100 patches. At the end of the 19th century. they were found in the Yenisei basin. In general, these were discoveries of little practical importance. Initial searches initiated before the Second World War …