YAG

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Refractive Index : 1.833 (+ 0.010 – 0.010)

Optical Characteristic : SR

Specific Gravity : 4.60 to 4.50

Formula : Y3AI5O12

Crystal System : Cubic

Variety/Species : Yttrium Aluminum Garnet

Species/Group : Garnet (Man-made)

Birefringence : None

Dispersion : 0.028

Hardness : 8.25

Toughness : Good

Ultrasonic : Uaually safe

Steam : Usually safe

UV Long : Inert to strong

UV Short : Inert to strong

Pleochroism : None

Strength : N/A

Pleochroism Colors : None

Heat : Stable

Acids : No reaction

Light : Stable

Polish Luster : Vitreous to subadamantine

Fracture : Conchoidal to uneven

Fracture Luster : Vitreous to subadamantine

Clarity Type : N/A

Tones : N/A

Saturations : N/A

Cause of Color : Green-chromium; yellow-titanium; blue-cobait; red-maganese

Enhancements : None

Cleavage : None

Color Range : Colorless, reddish purple, purple-red, , orangy red, red-orange, reddish orange, orange yellowish orange, violetish blue, bluish violet, violet, bluish purple, black, brown, pink, yellow, greenish yellow, yellow-green, green-yellow, green, green-blue, blue-green, purple, yellowish brown, yellowish white, brownish yellow, yellow-orange, orange-yellow, yellowish. Nearly any color is possible

Transparency : Transparent

Phenomena : None

Separations : YAG from-
Diamond : Thermal tester, dispersion, SG, spectrum, magnification, see-through.Zircon : Doubling, magnification, spectrum

Cubic Zirconia : Dispersion, SG, spectrum, see-through

Spessartite garnet : Magnification, spectrum, SG

GGG : dispersion, SG, see-through

Demantoid gernet : Magnification, dispersion, SG, spectrum

Identifying Characteristics and information
Strong see-through, may have gas bubbles, rounded facet junctions.Green : curved striase, red flashes by transmitted light.

There are no known natural garnets with the chemical composition of YAG

Spectral Data
Not diagnostic

Trade Names and Misnomers
Alexite
Amatite
circolite
Dia-Bud
Diamite
Diamogem
Diamonair
Diamonite
Diamone

Tags: Alexite, Amatite, circolite, cubic, Dia-Bud, Diamite, Diamogem, Diamonair, Diamone, Diamonite, Yttrium Aluminum Garnet