GLASS OBSION TWIN RAY  3.41 CTS 18256 - RARE COLLECTORS GEM

GLASS OBSION TWIN RAY 3.41 CTS 18256 - RARE COLLECTORS GEM

  • $120.00

Carats 3.41
Size 12.5 x 8.4 mm
Color Deep Orange Green
Clarity VVSI
Shape Oval
Treatment None
Origin Sri Lanka
Location Colombo,Sri Lanka
Price $ 120.00
100% Natural - Not treated in any way.
Rare Colectors Gem.
Suitable for Museums,Institutions and Students of Gemology.
Will make a Gorgeous Ring or Pendent accented with Diamonds.
''Ideal for Designer Jewelry"
Gem with High Lustre and Good Clarity.
Large Sizes are Extremely Rare!

Refractive Index: 1.606 - 1.641
Hardness: 5 to 5.5
Chemical Comp: 70–75%SiO2,
Crystal Group: Monoclinic

Obsidian is a naturally occurring volcanic glass formed as an extrusive igneous rock. It is produced when felsic lava extruded from a volcano cools rapidly without crystal growth. Color Black, gray, dark green, red, yellow, pink . Because of this lack of crystal structure, obsidian blade edges can reach almost molecular thinness, leading to its ancient use as projectile points and blades, and its modern use as surgical scalpel blades.


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