Many consumers know that chalcedony is a kind of jade, or that chalcedony is the essence of jade, is that chalcedony jade? Is chalcedony a jade?
Chalcedony is not a strict mineralogy jade. Chalcedony is a kind of quartz, a general term for cryptoplasts of SiO2, which is a variant of quartz (cryptocrystalline). It is truly mineralogy. The nephrite is a tremolite, hornblende, and actinolite mineral. It is also called Nephrite in English. Only Hetian jade and tremolite, Xiuyan jade are true nephrite.
The chemical composition of nephrite is calcium magnesium silicate (Ca2Mg5(OH)2(Si4O11)2), monoclinic system. The color is determined by the composition of the tremolite and the actinolite. The tremolite is mainly white and gray, and the color of the amphibole fluctuates in the dark green-red brown-black range according to the iron content and the oxidation degree of the iron element.
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