Purple Czochralski Lab Sapphire, Pixel Rectangle Cut, 40.5 Carats

SQO149

Regular price$1,250.00
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Gem Note

🍇🍇🍇 This astonishingly large, Czochralski-grown purple sapphire with a pixel cut will create a truly magnificent piece of jewelry. Its perfect proportions showcase a uniquely appealing pixel cut display. If you admire amethyst but need something more durable, this sapphire's exceptional hardness makes it an excellent choice for long-lasting wear.

 

DIMENSIONS AND SHAPE

Size: 19.93mm x 15.44mm x 11.7mm

Weight: 40.5  carats

Cut: Pixel Rectangle

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

  • Pendant
  • Cocktail Ring
  • Daily Wear

Collections

  • Fluorescent
  • Dichroic
  • Eco-Friendly

🌍 GENERAL MATERIAL DESCRIPTION

  • Material Name:CZ Purple Sapphire
  • Country of Origin : China
  • Growth Method: Czochralski

Purple sapphire derives its color from a mix of blue (titanium and iron) and red (chromium) dopants. In the flame fusion process, the iron and titanium change valence states, leading to a color difference between the center and the rim of the boule. While this can create a striking effect in a cut gem, the color consistency varies. Conversely, Czochralski-grown purple sapphire avoids this zoning issue through precise control over the growth chamber, resulting in a uniformly colored crystal. Despite its high production costs and lack of optical or industrial applications, this material is primarily supplied due to demand for full sapphire watch cases. This ornamental color, among others, is increasingly being produced to meet the rising demand for CNC-machined full sapphire watch cases.

🏭 SPECIFIC Lot INFORMATION

We received this batch of material from a supplier specializing in watch case materials.

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Purple Czochralski Lab Sapphire, Pixel Rectangle Cut, 40.5 Carats
Purple Czochralski Lab Sapphire, Pixel Rectangle Cut, 40.5 Carats
Purple Czochralski Lab Sapphire, Pixel Rectangle Cut, 40.5 Carats
Purple Czochralski Lab Sapphire, Pixel Rectangle Cut, 40.5 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.