CA-BOAG024GR-002-177

Natural Gems Belgium Colored Stone Certification CA-BOAG024GR-002-177

IDENTIFICATION : Natural grey Botswana Agate - 43.183 ct - long oval Cabochon

Species : Natural Chalcedony (a cryptocrystalline form of quartz)
Variety : Agate

DESCRIPTION

Shape & Cutting Style : long oval, cabochon, polished both sides
Measurements : 45 x 25.2 x 4.1 mm
Carat Weight : 43.183 Carat
Color : shades of grey (back side brownish red and grey) orangey on side
Clarity : N/A
Transparency : Semi-Translucent

Birefringence : Up to 0.004
Crystallography : Hexagonal (trigonal)
Dispersion : None
Luster : Waxy
Hardness : 6.5-7
Refractive index : 1.530-1.543
Specific gravity : 2.60-2.64

COMMENTS :

No indications of heating
correction of pictures capture; the pictures do not indicated truely colors as hey are;
front side of stone almost completey grey tones back side brownish red with grey tones, white dots visible on gemstone are sparkling

Personal Note From Natural Gems Belgium:

This oval shaped cabochon has good polish grade, fair to good symmetry, and has a nice natural variation of grey tones. Very nice pattern, very good and unique color.
natural inequalities due to crystal formation