LuAG "ULTRA GREEN", House Of Sylas Long Cushion Cut, 22.155 Carats


Regular price$1,150.00
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Gem Note

🔥🔥🔥 This substance appears to be a standard Ce:LuAG sample, enhanced with additional cerium, resulting in a brighter, greener, and more fluorescent quality compared to typical LuAG. The way it's cut generates numerous internal reflections, amplifying the green intensity. This material is exceptionally unique, and we haven't had another chance to acquire it. It promises to transform into an extraordinary piece of jewelry.



Size: 15.96mm x 10.7mm x 8.64mm

Weight: 22.155  carats

Cut: House Of Sylas Long Cushion

Shape: Long Cushion

Clarity: Loupe Clean

Inclusions: None

Treatment: None



MOHS hardness: 8.0


Dispersion: 0.018

Density: 6.7

Refractive Index: 1.9

Chemical Formula: Lu3Al5O12


  • Pendant
  • Cocktail Ring
  • Daily Wear


  • Neon
  • Vivid
  • Fluorescent
  • Eco-Friendly
  • Lumogarnets


  • Material Name:Ce:LuAG
  • Country of Origin : China
  • Growth Method: Czochralski

Cerium-doped Lutetium Aluminum Garnet (Ce:LuAG) is a phosphor material that has gained significant attention for its industrial applications, especially in the fields of lighting and imaging. As a scintillator, Ce:LuAG is highly effective in converting high-energy radiation into visible light, which makes it particularly valuable in medical imaging systems such as computed tomography (CT) scanners and in security scanning systems. Its excellent light yield and fast decay time enable high-resolution imaging, crucial for accurate diagnostics and security inspections. Additionally, Ce:LuAG is used in LED lighting technology. When combined with blue or ultraviolet LEDs, it produces a bright, white light with good color rendering, making it suitable for various lighting applications where natural light reproduction is desired. This includes high-end, energy-efficient lighting solutions in commercial, medical, and automotive industries. The unique properties of Ce:LuAG, including its stability and radiation hardness, make it an important material in advancing imaging technology and developing efficient lighting solutions.


This "Ultra Green" sample is essentially Ce:LuAG, but it contains a significantly higher concentration of cerium (Ce). We've encountered only one such piece, and we consider ourselves fortunate to possess it.

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LuAG "ULTRA GREEN", House Of Sylas Long Cushion Cut, 22.155 Carats
LuAG "ULTRA GREEN", House Of Sylas Long Cushion Cut, 22.155 Carats
LuAG "ULTRA GREEN", House Of Sylas Long Cushion Cut, 22.155 Carats
LuAG "ULTRA GREEN", House Of Sylas Long Cushion Cut, 22.155 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.