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Lazurite is a product of contact metamorphism of limestone and is typically associated with calcite, pyrite, diopside, humite, forsterite, hauyne and muscovite. [ 2 ] Other blue minerals, such as the carbonate mineral, azurite , and the phosphate mineral, lazulite , may be confused with lazurite, but are easily distinguished with careful ...
Haüyne or prismatic azure spar is a transparent or translucent mineral, similar to lazurite, in composition sodium and calcium aluminosilicate with the ideal formula (Na,Ca) 4-8 Al 6 Si 6 (O,S) 24 (SO 4,Cl) 1-2 having a blue or blue color, sometimes with a greenish tint, [5] was also known among the azure spars.
Gemstones of the World revised 5th edition, 2013 by Walter Schumann ISBN 978-1454909538 Smithsonian Handbook: Gemstones by Cally Hall, 2nd ed. 2002 ISBN 978-0789489852 hide
Lazulite or Azure spar [6]: 14 is a transparent to semi-opaque, blue mineral that is a phosphate of magnesium, iron, and aluminium, with the chemical formula (Mg,Fe 2+)Al 2 (PO 4) 2 (OH) 2. [3]
lazurite Na 3 Ca(Si 3 Al 3)O 12 S; tsaregorodtsevite N(CH 3) 4 Si 4 (SiAl)O 12; tugtupite Na 4 BeAlSi 4 O 12 Cl; vladimirivanovite Na Na 6 Ca 2 [Al 6 Si 6 O 24](SO 4,S 3,S 2,Cl) 2 ·H 2 O; All these minerals are feldspathoids. Haüyne forms a solid solution with nosean and with sodalite. Complete solid solution exists between synthetic nosean ...
Sodalite is a member of the sodalite group with hauyne, nosean, lazurite and tugtupite. The people of the Caral culture traded for sodalite from the Collao altiplano . [ 6 ] First discovered by Europeans in 1811 in the Ilimaussaq intrusive complex in Greenland , sodalite did not become widely important as an ornamental stone until 1891 when ...
Originating from the Persian word for the gem, lāžward, [1] lapis lazuli is a rock composed primarily of the minerals lazurite, pyrite and calcite. As early as the 7th millennium BC, lapis lazuli was mined in the Sar-i Sang mines, [2] in Shortugai, and in other mines in Badakhshan province in modern northeast Afghanistan. [3]
Another Sar-e Sang Lazurite crystal, with the classic deep azure-blue color. Crystal is 4.5 cm wide. Sar-i Sang (or Sar-e Sang) (lit. "stone summit" in Persian) is a settlement in the Kuran Wa Munjan District of Badakhshan Province, Afghanistan, famous for its ancient lapis lazuli mines producing the world's finest lapis. [1]