Advanced Optical Crystals Grown for Precision & Performance
At LifeGem, we produce high-quality YAG (Yttrium Aluminum Garnet) crystals using the Kyropoulos method—one of the most advanced processes for growing large, high-purity single crystals. YAG is known for its excellent mechanical strength, optical clarity, and thermal resistance, making it an ideal material not only for jewelry but also for industrial, medical, and scientific applications.
What is YAG?
Yttrium Aluminum Garnet (YAG) is a lab-grown structural analogue of natural garnet, surpassing it in clarity, hardness, and optical performance. These crystals are not only flawless but also cut and polish beautifully—making them a luxurious choice for fine jewelry.
- Exceptional optical transparency
- Superior hardness and scratch resistance
- High thermal and chemical stability
- Custom coloration for specialized uses
Applications of YAG Crystals
YAG as a Diamond Simulant
When grown colorless, YAG offers a bright dispersion and fire that closely mimics diamonds. It is also dopable with rare earth elements to produce a wide palette of vivid colors:
Pink or purple (doped with neodymium or erbium)
Yellow (doped with cerium)
Green, red, blue, and more through various treatments
YAG’s clarity and sub-adamantine luster provide a high-end visual appeal with no inclusions, scratches, or blemishes—making it a premium alternative to traditional diamond simulants.
YAG as a Simulant for Precious Gemstones
Its optical properties and color versatility
serves as an excellent simulant for:
Emerald
Ruby
Sapphire
Alexandrite
Each YAG gemstone can be grown and colored to match the appearance of these beloved natural stones, offering a cost-effective, long-lasting, and ethical alternative.
Available Colours and Sizes of Cut & Polished YAG Gemstones
For jewelry applications, we offer cut and polished YAG gemstones in 10 stunning colors and shades, ranging in size from 3 mm to 15 mm (approximately 0.15 to 20 carats). Available colors include: Blue, Yellow, Dark Green, Amber, Light Green, White, Pink, Swiss Blue, Beige, Colour Changing Alexandrite.