Лапис лазули и стомана
- Производител: Love&Life Jewelery
- Модел: Лапис лазули и стомана
Колие стомана 45 см
Лапис лазули 8 мм
Lapis lazuli is a sodium aluminium silicate with sulphur, chlorine hydroxyl, and variable inclusions of pyrite and white calcite.
The name means "blue rock" and is always a brilliant blue with violet or greenish tints.
The rich blue colour is due to the lazurite that is an essential component of this mineral. Small crystals of pyrite are always present in lapis lazuli and their brassy yellow colour is both attractive and diagnostic in distinguishing lapis lazuli from its blue cousin - sodalite, which lacks pyrite. The calcite produces white streaks in the lapis and too much calcite will lower the value of the stone.
Lapis lazuli has been mined for centuries from a locality still in use today in the Kokcha River Valley, Afghanistan. First mined 6000 years ago, the rock was transported to Egypt and present day Iraq and later to Europe where it was used in jewellery and for ornamental stone. Europeans even ground down the rock into an expensive powdered pigment for paints called "ultramarine". Although no longer the only source of lapis, Afghanistan still produces the finest quality material. Other deposits of generally lower quality are in Chile and Russia.