Djeva Green Lab Sapphire, Emerald Cut, 7.35 Carats
SQO196
💚💚💚 Djeva 78 was a rare, high-quality, and expensive green sapphire material produced by Djeva. Renowned for its intense saturation, it remains one of the most vibrant green sapphire materials available. This stunning emerald-cut gemstone promises to create an elegant piece of jewelry that will last a lifetime!
DIMENSIONS AND SHAPE
Size: 12.5mm x 8.88mm x 6.35mm
Weight: 7.35 carats
Cut: Emerald
Shape: Rectangle
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
Collections
🌍 GENERAL MATERIAL DESCRIPTION
- Material Name:Djeva 78
- Country of Origin : Switzerland
- Growth Method: Flame Fusion
Djeva 78 represents the pinnacle of cobalt green sapphire in the market. The challenge in cultivating cobalt-doped sapphire stems from two primary difficulties. First, incorporating cobalt into the sapphire matrix is complex. Second, cobalt exhibits dual valence states (Co2+ for blue and Co3+ for green), and managing these states during the growth process demands stringent conditions. This material is priced significantly higher, costing 20-30 times more than flame fusion ruby, due to its intricate growth process and was produced in very limited quantities to meet a specialized demand. With the closure of Djeva, the prospects of finding a similar quality green flame fusion sapphire in the future are slim. It is, in many respects, considered one of the ultimate achievements in laboratory-created flame fusion green sapphire.
This material does not exhibit any fluorescence.
🏭 SPECIFIC Lot INFORMATION
Our stock of A grade Djeva 78 is limited. This grade enables the cutting of the deepest stones. Generally, the boules are small, restricting the size to 11/12mm.
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