Description
Kornerupine Gemstone 6.75ct
Description
This Natural Kornerupine is Gemstone Which is Green Colour, it’s Originates From India and it’s Exact Weight is 6.75ct . The Measurements are 15.58×10.22×5.57mm . The Shape and Cut of This Stone is Oval Mixed Cut. It’s Graded Transparent and Clarity is Very Good. This 6.75ct Green Natural Kornerupine Gem is Available for Ready to Ship Anywhere in The World. You Can also Select Certification and Shipment Method as Optional.
Details
Summary No | AK07906 |
Species | Natural Kornerupine |
Weight | 6.75ct |
Shape/cut | Oval Mixed Cut |
Colour | Green |
Dimension | 15.58×10.22×5.57mm |
Clarity | Good |
Transparency | Transparent |
Origin | India |
Treatment | None |
Kornerupine Gemstone 6.75ct
Properties of Kornerupine
Chemical Composition: (Mg, Fe2+)4Al6(Si, Al, B)5O21(OH) Magnesium Iron Aluminum Boro-silicate Hydroxide
Hardness: 6.0 – 7.00Moh
Specific Gravity (Density): 3.28 – 3.35
Refractive Index: 1.660 -1.684(DR)
About: Kornerupine
Kornerupine is a rare gemstone that is available in shades of green, bluish green, yellowish green and yellowish brown. The most desirable gems are the emerald green gems from Sri Lanka and Tanzania that are coloured green by the presence of vanadium. Beautiful bluish green Kornerupine gems come from Madagascar and cats eye cabochons are available from Sri Lanka. Star Kornerupine has been found in Mogok, Myanmar (Burma) but is very rare. Kornerupine was originally found in Greenland as non-gemmy, radiating crystals but later found there as dark green gemmy crystals.
Kornerupine was named in 1884 by Danish mineralogist Johannes Theodor Lorenzen (1855-1884) in honour of Danish geologist, Andreas Nikolaus Kornerup (1857-1883). Kornerup died at age 26 from a lung disease he contracted while on an expedition in Greenland. Although Kornerup died at such a young age, he managed to establish himself as a well-respected geologist in Greenland research. Coincidentally, Johannes Lorenzen also died at a young age, 29, while on an expedition in Greenland in 1884.
Current sources of gem quality crystals are Ivohibe District, Horombe Region, Fianarantsoa Province, Madagascar; Mogok Township, Pyin-Oo-Lwin District, Mandalay Division, Burma (Myanmar); Matara District, Southern Province, Sri Lanka; Lelatema Mts, Simanjiro District, Manyara Region, Tanzania.
Kornerupine distribution: some localities for well-studied material: In Greenland, at Fiskenæsset. At Bjordam, near Krager Norway. In Germany, from Waldheim, Saxony. From Mautia Hill, Tanzania. On the Bokse Puts Farm, Namaqualand, Cape Province, South Africa. Gem crystals from Itrongahy, near Betroka, and elsewhere in Madagascar. From gem gravels of the Matale, Ratnapura, and Embilipitiya districts, Sri Lanka. In the Harts and Strangeways Ranges, Northern Territory, Australia. At Lac Ste-Marie, Quebec, Canada