Czochralski Alexandrite, House Of Sylas Cushion Cut, 3.33 Carats


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Gem Note

🔥🔥🔥 An exquisite lab-created Alexandrite, boasting a remarkable color change and vivid red fluorescence in natural light. This gemstone replicates the unparalleled allure of top-quality natural Alexandrite. Designed with precision that goes well beyond the usual industry standards, it's destined to be a timeless piece of jewelry. (Note, photographing alexandrite is particularly difficult. We try our best.)



Size: 8.41mm x 8.4mm x 6.16mm

Weight: 3.33  carats

Cut: House Of Sylas Cushion

Shape: Cushion

Clarity: Loupe Clean

Inclusions: None

Treatment: None



MOHS hardness: 8.5

Pleochroism: Trichroic

Dispersion: 0.018

Density: 3.72

Refractive Index: 1.75

Chemical Formula: Al2BeO4


  • Engagement Ring
  • Daily Wear
  • Pendant


  • Fluorescent
  • Color Change
  • Trichroic


  • Material Name:CZ Alex
  • Country of Origin : Thailand
  • Growth Method: Czochralski

Lab-grown Alexandrite, meticulously cultivated through the Czochralski method by Tairus in Thailand, is a sophisticated response to the increasing demand for precious gemstones. This innovative process yields a trichroic mineral, remarkable for its ability to display a spectrum of colors — green, blue, and a hint of orangish hues — depending on the crystallographic axis along which it is viewed and cut. This unique characteristic means that the specific orientation chosen for cutting can subtly influence the final appearance of the gem, making each piece distinct with its color transitions.

However, the inherent darkness of this lab-created material presents a limitation on the size of the finished gemstone. In addition to its fascinating color shift, this synthetic Alexandrite showcases an extraordinary red fluorescence when exposed to sunlight, similar to the deep red seen in Christmas garnet. This intense fluorescence adds another layer of beauty, making the gemstone glow with a captivating red hue under direct sunlight. Such a feature not only enhances its visual appeal but also sets it apart from other gemstones, making it a prized possession for collectors and jewelry enthusiasts alike.

By combining the traditional allure of natural Alexandrite with the advancements in synthetic gemstone production, Tairus's lab-grown Alexandrite bridges the gap between rarity and accessibility. It offers a sustainable and beautiful alternative that captures the essence of one of the most sought-after gemstones in the world, ensuring that each piece can be cherished for its unique beauty and remarkable properties.


This specific material, notable for its deep hue, is best used for stones smaller than 15mm. Capturing its essence in photographs poses a challenge due to its intense darkness. However, it dazzles with beautiful, color-changing sparkles. Admirers of darker, color-shifting gems such as natural alexandrite or garnet will find this material particularly appealing.

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Czochralski Alexandrite, House Of Sylas Cushion Cut, 3.33 Carats - DJEVA
Czochralski Alexandrite, House Of Sylas Cushion Cut, 3.33 Carats
Czochralski Alexandrite, House Of Sylas Cushion Cut, 3.33 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.