This Serpentine is natural gemstone which is Green color, it’s Originates from Afghanistan and it’s exact weight is 14.97ct the measurements are 17.93×13.06×8.54mm, the shape and cut of this stone is Oval Cabochon . It’s graded Translucent and clarity is good. This 14.97ct Green natural Serpentine Gem is available for ready to ship anywhere in the world. You can also select Certification and shipment method as optional Afghanistan
Properties Of Serpentine
Chemical Composition: Mg6[(OH)8lSi4O10]; Basic magnesium silicate
Hardness: 2.5 to 5.5
Specific Gravity (Density): 2.44 to 2.62
Refractive Index: 1.560 to 1.571
About Serpentine Gemstone
There are two aggregate structures for serpentine(Latin-snake), leafy antigorite (leafy serpentine) and fibrous chrysotile. Very finely fibrous varieties are called asbestos. It has a greasy to the silky luster and is sensitive to acids. Colors are often spotty. Minerals once classed as members of the serpentine group now find themselves in the kaolinite-serpentine group which comprises hexagonal, trigonal, orthorhombic, monoclinic or triclinic silicates with the general composition M2 3 Z2O5(OH)4nH2O where M Al, Fe3, Fe2, Mg, Mn2, Ni, Zn; Z Al, Fe2, Si. Bowenite is antigorite as are the minerals for which the name serpentine has long been in general nonspecific use. Kaolinite serpentine group minerals are polished primarily for their attractive patterning though some may be intended to resemble the jade minerals nephrite and jadeite. A distinction is not too difficult by gemological testing as both nephrite and jadeite have SG (3.0 and 3.3 respectively) higher than kaolinite serpentine minerals. Using the validated names of today antigorite, clinochrysotile, and lizardite the SG and RI range for antigorite is 2.61, 1.560 1.571 respectively with birefringence 0.014. For clinochrysotile, RI is 2.53 2.55 and 1.545 1.569, birefringence 0.001. For lizardite, RI is 1.546 1.560, birefringence 0.008.