Description
Bowenite Gemstone 5.87ct
Description
This Natural Bowenite is Gemstone Which is Pale Green Color, it’s Originates From Afghanistan and it’s Exact Weight is 5.87ct. The Measurements are 14.00×9.42×6.32mm. The Shape and Cut of This Stone is Oval Mixed Cut. It’s Graded Translucent and Clarity is Good. This 5.87ct Pale Green Natural Bowenite Gem is Available for Ready to Ship Anywhere in The World. You Can Also Select Certification and Shipment Method as optional.
Details
Summary No | AK03680 |
Species | Natural Bowenite |
Weight | 5.87ct |
Shape/cut | Oval Mixed Cut |
Colour | Pale Green |
Dimension | 14.00×9.42×6.32mm |
Clarity | Good |
Transparency | Translucent |
Origin | Afghanistan |
Treatment | None |
Bowenite Gemstone 5.87ct
Properties Of Bowenite
Chemical Composition: Mg6[(OH)8lSi4O10]; (Basic Magnesium Silicate)
Hardness: 2.5 to 5.5Moh
Specific Gravity (Density): 2.44 to 2.62
Refractive Index: 1.560 to 1.571
About: Bowenite Gemstone
There are two aggregate structures for serpentine(Latin-snake), leafy antigorite (leafy serpentine) and fibrous chrysotile. Bowenite is a hard, compact variety of the serpentine. Very finely fibrous varieties are called asbestos. It has a greasy to a 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 M23 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.