Blue Cobalt YAG, Hexagon Step Cut, 39.4 Carats

SQO49

Regular price$950.00
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Gem Note

😲 Captivating cobalt-doped YAG, boasting a vivid hue akin to "Swiss Blue Topaz." For aficionados of the radiant Swiss blue topaz color, this gemstone is a revelation, offering unparalleled vivacity, enhanced durability, and superior optical dispersion. This gem, featuring a striking hexagonal step cut, is ideally suited for Art Deco-inspired jewelry designs, presenting a timeless and versatile choice that promises enduring beauty.

 

DIMENSIONS AND SHAPE

Size: 20.06mm x 17.38mm x 11.97mm

Weight: 39.4  carats

Cut: Hexagon Step

Shape: Hexagon

Clarity: Loupe Clean

Inclusions: None

Treatment: None

 

PHYSICAL PROPERTIES

MOHS hardness: 8.5

Pleochroism: 

Dispersion: 0.018

Density: 4.6

Refractive Index: 1.83

Chemical Formula: Y3A15O12

POSSIBLE JEWELRY APPLICATIONS

  • Pendant
  • Cocktail Ring
  • Brooch

Collections

  • Vivid

🌍 GENERAL MATERIAL DESCRIPTION

  • Material Name:Co:YAG
  • Country of Origin : Russia
  • Growth Method: HDSM

A single, unidentified producer, as we understand it, employs the HDSM method to cultivate YAG doped with cobalt (which we believe to be cobalt), exclusively for the gemstone market, with no known scientific applications. This material is available in a spectrum of Swiss blue hues, with the lightest being extremely faint. The outcome is an exceptionally brilliant and strikingly vivid blue gemstone. The deeper variants yield gems of remarkable quality, boasting superior dispersion, hardness, and refractive index compared to irradiated Swiss blue topaz, making them stand out in the realm of materials with a Mohs hardness exceeding 8. Among the most vibrant green to blue color ranges found in any substance are those of Yb:YAG, Co:YAG, and V:YAG.

🏭 SPECIFIC Lot INFORMATION

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Blue Cobalt YAG, Hexagon Step Cut, 39.4 Carats - DJEVA
Blue Cobalt YAG, Hexagon Step Cut, 39.4 Carats
Blue Cobalt YAG, Hexagon Step Cut, 39.4 Carats
Blue Cobalt YAG, Hexagon Step Cut, 39.4 Carats
Blue Cobalt YAG, Hexagon Step Cut, 39.4 Carats


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🧠 Gemology Literature

The articles cited here about lab created gemstones are all open source and chronologically sorted for quick and easy access. Each article comes from either the Journal of Gemmology (JofG) or Gems and Gemmology (G&G) archives.