Cobalt Teal Lab Sapphire, Antique Cushion Cut, 5.865 Carats
SQO270
DIMENSIONS AND SHAPE
Size: 10.23mm x 10.26mm x 6.77mm
Weight: 5.865 carats
Cut: Antique Cushion
Shape: Cushion
Clarity: Loupe Clean
Inclusions: None
Treatment:None
PHYSICAL PROPERTIES
MOHS hardness: 9.0
Pleochroism:
Dispersion: 0.018
Density: 4.0
Refractive Index: 1.76
Chemical Formula:Al2O3
POSSIBLE JEWELRY APPLICATIONS
Engagement Ring, Pendant, and Daily Wear
🌍 GENERAL MATERIAL DESCRIPTION
- Material Name:FF Teal Dark
- Country of Origin : Unknown
- Growth Method:
In the sapphire crystal lattice, the chromophore cobalt demonstrates two distinct valence states: Co2+ (resulting in a blue coloration) and Co3+ (yielding a green hue), contingent upon factors such as temperature, atmospheric conditions, and growth parameters. The resultant coloration can span a spectrum from green to teal to blue, contingent upon the relative abundance of Co2+ and Co3+. These crystals consistently exhibit color variegations, primarily stemming from the intricate challenge of precisely controlling all growth conditions, thereby bestowing upon each gem a distinct and unique hue.
🏭 SPECIFIC Lot INFORMATION
This material exhibits a notably inconsistent texture akin to the majority of cobalt-doped flame-fusion sapphires. Its provenance remains uncertain. The boules are characterized by their substantial size, typically displaying a predominantly pale green-yellow hue. However, a limited selection of sections can be to reveal an exquisite light blue-green colored gemstone.
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