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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.
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]
Hauyne or haüyne, also called hauynite or haüynite (/ ɑː ˈ w iː n aɪ t / ah-WEE-nyte), [7] old name Azure spar, [8]: 571 is a rare tectosilicate sulfate mineral with endmember formula Na 3 Ca(Si 3 Al 3)O 12 (SO 4). [1]
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Azurite is used occasionally as beads and as jewelry, and also as an ornamental stone. [21] However, its softness and tendency to lose its deep blue color as it weathers leaves it with fewer uses. [22] Heating destroys azurite easily, so all mounting of azurite specimens must be done at room temperature.
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