Andradite Garnet and Petalite Optical Properties

Andradite Garnet

Petalite

Add ⊕

1 Optical Properties

1.1 Luster

Adamantine

Vitreous, Pearly

1.2 Pleochroism

Not Available

AbsentWalter Schumann

1.3 Dispersion

NA0.01

0.007 1

1.4 Transparency

Transparent, Opaque, Transparent to opaque

Gemmological Tables (2004) More from other references

1.5 Refractive Index

1.888-1.8891.502-1.523

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Isometric

monoclinic

1.8 Birefringence

Not Available0.012-0.016

0 0.296

1.9 Clarity

Transparent to opaque

TransparentUlrich Henn and Claudio C. Milisenda

Andradite Garnet and Petalite Optic Character

Andradite Garnet and Petalite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Andradite Garnet and Petalite Physical Properties like crystallographic symmetry, pleochroism,etc. in the crystal. Some of the optical properties are refractive index, luster, optic character, pleochroism etc. Prominent among these is Andradite Garnet and Petalite optic character. You might have noticed your gemologist rotating the gemstone while testing it. Rotating a gemstone along its optic axis helps in determining its optic character.

Compare Blue Gemstones

Andradite Garnet Vs Lemon quartz

Andradite Garnet Vs Rutilated topaz

Andradite Garnet Vs Trapiche emerald

Andradite Garnet and Petalite Transparency

Similar to their colors, Andradite Garnet and Petalite transparency can also be used as criteria for their primary identification. Although transparency cannot be the only criteria for gemstone identification, it can efficiently used in gemstone grading. Talking about their transparency, Andradite Garnet is Opaque, Transparent and Transparent to opaque while Andradite Garnet is Opaque, Transparent and Transparent to opaque in appearance.