FA-BOAG024GR-001-028

Natural Gems Belgium Colored Stone Certification FA-BOAG024GR-001-028

IDENTIFICATION : Natural brownish grey and deep orangy red Botswana Agate - 22.85 ct - Pear - crystal structure line in center

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

DESCRIPTION

Shape & Cutting Style : Pear, cabochon, polished both sides
Measurements : 30.3 x 18.5 x 5.3 mm
Carat Weight : deep brownish orangy red - brownish grey - deep red lines
Color : shades of grey, orangy red and white  
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
crystal stucture in center in a line, can make gemstone fragile

Personal Note From Natural Gems Belgium:

This pear shaped cabochon has good to very good polish grade. fair symmetry, has little bit curved flat side, and has good unique color, the pattern is very distict.