Lapis Lazuli 13.90ct
This Lapis Lazuli is natural gemstone which is Blue colour, it’s Originates from Afghanistan and it’s exact weight is 13.90ct the measurements are 20.6×15.3×5.6mm, the shape and cut of this stone is Pear Cabochon It’s graded Opaque and clarity is good. This 13.90ct Blue natural Lapis Lazuli Gem is available for ready to ship anywhere in the world. You can also select Certification and shipment method as optional.
|Species||Natural Lapis Lazuli|
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Lapis Lazuli 13.90ct
Properties Of Lapis Lazuli
Chemical Composition: Na6Ca2Al6Si6O24[(SO4),S,Cl,(OH)]2
Specific Gravity (Density): 2.38 – 2.42
Refractive Index: 1.50 – 1.522
About Lapis Lazuli
Lazurite (Lapis Lazuli) is one of the members of the Feldspathoid group of minerals that includes Cancrinite, Haüyne, Lazurite, Leucite, Nepheline and Sodalite. Minerals with chemistries that are close to those of the alkalai Feldspars, but are poor in silica (SiO2) content, are called Feldspathoids. Lazurite is also a member of the Sodalite group of minerals that includes Hackmanite, Haüyne and Tugtupite. Lazurite could be considered a Sulphur-rich form of Haüyne. Lazurite crystals are rarely found, however. It is more commonly found combined with other minerals as a rock called Lapis Lazuli, or just Lapis. Lazurite and Lapis are two separate things; Lazurite is a mineral and Lapis Lazuli is a rock composed of many different minerals, but we are grouping them together on this page since they are so closely related. Lapis contains mostly massive forms of Lazurite combined with Haüyne, Sodalite, Nosean, (all members of the Sodalite group of minerals) and white Calcite, Pyrite, and other minerals. The Calcite and Pyrite give Lapis a very attractive look and the presence of Pyrite distinguishes Lapis from its blue cousin – Sodalite rock, which lacks Pyrite.
The name Lazurite is often confused with another blue mineral, the phosphate mineral Lazulite. Although the names are similar, their crystal habit is very different. Lazurite is very rarely found as distinct crystals and Lazulite has good crystal habit and vitreous luster. The carbonate mineral Azurite has a very similar colour to Lazurite but is associated with the green carbonate mineral Malachite and reacts to acids.
Lapis Lazuli has been mined for centuries from a source still in use today in the remote mountain valley of Kokcha, Afghanistan. Although there are other sources of Lapis worldwide, Afghanistan still produces the finest quality material