Andesin 6 mm. VVS1

Natural mineral: Andesine
Purity: Vvs1 Flawless
Size: 6 mm.
Total weight: 0,75 CT.
Form cut: round
Gloss: gorgeous
Color: reddish-orange rich AAA (the color of the Sun at sunset)
Elevation: no
Origin : Of The Congo, Africa
Hardness: 6-6,5
Art. 0236

Andesin (eng. andesine, Germany. Andesin) - a mineral from the plagioclase group.
The mineral was found and described in 1841 in a mine in the chocó Department in Colombia. The name comes from the Andes mountains in South America, due to its abundance in the andesite lavas in those mountains.
A member of the isomorphic series NaAlSi3O8 (albite) - CaAl2Si2O8 (anorthite), contains 30—50 % of the anorthite molecule.
Color white, grayish, shiny glass, the fracture is uneven. Andesin is mainly found in the form of granular aggregates and very rarely forms crystals of columnar, thick-tabular form.
Melts with difficulty. It is difficult to dissolve in acids.
Formula (Na, Ca) Al (Si,Al)3O8
Physical properties
Color Gray, yellow, red, light green
Feature color White
Glitter glass
Transparency Transparent to translucent
The hardness of 6 - 6,5
Cleavage is perfect
The fracture is Uneven, cancellous; brittle
Density 2,7 g / cm
Crystal system triclinic