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Amethyst Oval cut loose faceted natural 4.3 cts 13x11x7mm O792


O792
 product stars
$73.00 $3.65
Units in Stock: 1

Amethyst Oval cut loose faceted natural 4.3 cts 13x11x7mm O792 Summary

Amethyst Oval cut loose faceted genuine natural gemstone 4.3 cts 13x11x7mm O792
 
 
 
Certified
100% real not man made but genuine from the earth gemstone.
100% Genuine and natural no treatment.
100% money back if not happy.  


 
 

 We sell rough and cut gemstones, offering a wide range of rough gemstones for specimen-cabbing-facet and beautiful cut stones ready for your mount..Either for a new piece of jewelry or replacing a stone in an existing piece of jewelry.We offer thousands of lots, all with individual photos, what you see in the photo is what you will receive. Tommysrocks, an internet only business since 2002, giving our internet customers 100% of our attention.


CLARITY SCALE
IF VERY HIGH QUALITY & FREE FROM INCLUSIONS.
VVS HIGH QUALITY WITH VERY SLIGHT INCLUSIONS.
VVS1 HIGH QUALITY WITH SLIGHT  INCLUSION.
VS FINE QUALITY WITH  INCLUSION SLIGHTLY VISIBLE TO THE NAKED EYE.
VS1 FINE QUALITY WITH INCLUSION VISIBLE TO THE NAKED EYE.
SI GOOD QUALITY WITH  INCLUSIONS VISIBLE TO THE NAKED EYE.
SI1 INCLUSIONS BECOMING PROMINENT TO THE EYE.
I INCLUDED.

THIS GEMSTONE IS GRADED:  I F

 

 

Mohs hardness: 7

Refractive index: 1.544-1.553

Critical angle: 40°

Specific gravity: 2.63-2.65

Cleavage: None

Fracture: Conchoidal, brittle.

Dispersion: Medium (.013)

Heat sensitivity: Low

Pleochroism: Amethyst: very weak (purple to grayish purple); Natural citrine: weak (yellow to light-yellow); Prasiolite: very weak (light-green to paler green); Rock crystal: colorless, no dichroism; Rose quartz: weak (pink to paler pink); Natural dark smoky: definite (brown to reddish-brown).

Birefringence (double refraction): Weak (.009)

Crystal structure: Hexagonal

Treatments: Oro Verde, lemon citrine, smoketrine and most dark gray smoky quartz without any brown tones are all irradiated.  Citrines are often heat treated to improve color and give a reddish tint.  Most citrine is amethyst that has been heat treated.  Some smoky can be heated to create citrine.  Prasiolite is heat treated amethyst and citrine from one locality.

 
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