Natural brownish red and puplish grey Botswana Agate - 57.15 ct - oval Cabochon

Natural brownish red and puplish grey Botswana Agate - 57.15 ct - oval Cabochon
 Botswana Agate is known for its unique range of earthy colors, including natural brownish red and puplish grey as is this oval cabochon. With a generous weight of 57.15 ct, this oval cabochon is a stunning addition to any collection.

Natural Gems Belgium Colored Stone Certification FA-BOAG024GR-001-025

IDENTIFICATION

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

DESCRIPTION

Shape & Cutting Style : oval, cabochon, polished both sides
Measurements : 49.8 x 31.1 x 4.1 mm
Carat Weight : 57.15 Carat
Color : brownish red , reddish white to purplish grey 
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
tiny chips on back of cabochon, not visible without magnification

Personal Note From Natural Gems Belgium:

This oval shaped cabochon has good polish grade. Good symmetry, and has good color

FIND THE ONLINE CERTIFICATE HERE

For impression take a look at the pictures, 

all items are sent insured with track and trace regardless of value