Yttrium Aluminum Garnet Faceting Information


Yttrium Aluminum Garnet Faceting Information

Yttrium Aluminum Garnet (YAG)

YAG/yttriumColor: Wide range of colors available.
Moh’s Hardness: 8.5
Refractive Index: 1.833
Critical Angle: 33.12°
Specific Gravity: 4.55
Cleavage: Imperfect
Fracture: Conchoidal
Dispersion: .028
Heat Sensitivity: Slight
Birefringence (double refraction): None
Crystal Structure: Isometric

Treatments: None

What I prefer to polishing with: Tin lap with Alumina oxide. Zinc laps with 8,000 pre-polish and 50,000 polish.

Jeff’s Comments: Cuts and polishes like Garnet. It is quite pretty especially in clear and light colors.

Design Links: 4-Way Stop – This is great for saturated rough if you have a piece that will work in the shape.
Princess – Nice in about any material
Brilliant Pear – Good in any color

 

About the author
Jeff R. Graham
The late Jeff Graham was a prolific faceter, creator of many original faceting designs, and the author of several highly-regarded instructional faceting books such as Gram Faceting Designs.
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