Lapis lazuli

Lapis lazuli is a blue stone whose chemical composition includes natural hydrous phosphates of aluminum, iron, magnesium and calcium; In other words, it is a combination of lazurite, calcite, pyrite, hornblende, augite and diaposite. This stone because of its hardness and beautiful blue color; Lapis lazuli is used as a gem in jewelry. Metaformic lapis lazuli with a cubic and dodecahedron crystal system is found in large to small veins, often in beds of several centimeters, among marbles or in irregular veins in limestone. The impurity of pyrite, which can be seen in the form of gold or bronze streaks or spots in this stone, adds to its appearance and price. The white dots on this lapis lazuli are often calcite, which reduces its value as they increase on this stone. Lapis lazuli is also produced synthetically. Also, lapis lazuli may be confused with stones such as lazolite, sodalite, azurite, blue jasper or domortirite.