Cobalt Lab Sapphire, Antique Cushion Cut, 30.2 Carats

CQC204

Regular price$800.00
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Shipping calculated at checkout.

Gem Note

๐Ÿงจ WOW! Such a rare color and size for lab created sapphire. This would make a stunning piece of jewelry that will last a lifetime!

 

DIMENSIONS AND SHAPE

Size: 19.3mm x 13.0mm x 9.25mm

Weight: 22.06  carats

Cut: Antique Long Cushion

Shape: Long Cushion

Clarity: Loupe Clean

Inclusions: None

Treatment: None

 

PHYSICAL PROPERTIES

MOHS hardness: 9.0

Pleochroism: Dichroic

Dispersion: 0.018

Density: 4.0

Refractive Index: 1.76

Chemical Formula: Al2O3

POSSIBLE JEWELRY APPLICATIONS

  • Cocktail Ring
  • Pendant
  • Brooch

Collections

  • Dichroic

๐ŸŒ GENERAL MATERIAL DESCRIPTION

  • Material Name:FF Teal
  • Country of Origin : Unknown
  • Growth Method: Flame Fusion

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.

๐Ÿญ 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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Cobalt Lab Sapphire, Antique Cushion Cut, 30.2 Carats - DJEVA
Cobalt Lab Sapphire, Antique Cushion Cut,  30.2 Carats
Cobalt Lab Sapphire, Antique Cushion Cut,  30.2 Carats

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