FA-BOAG024GR-001-026

Natural Gems Belgium Colored Stone Certification FA-BOAG024GR-001-026

IDENTIFICATION : Natural brownish reddish grey and orangy red Botswana Agate - 15.40 ct - cushion - crystal structure centered

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

DESCRIPTION

Shape & Cutting Style : Cushion, cabochon, polished both sides
Measurements : 19.6 x 19.4 x 4.1 mm
Carat Weight : 15.40 Carat
Color : brownish red , reddish orange  
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, going to the edge

Personal Note From Natural Gems Belgium:

This cushion shaped cabochon has fair to good polish grade. fair symmetry, and has good color, the centered crystal structure is nice for optical view, though an be sensitive for damage.