Hollandite and Yttrium Aluminium Garnet Optical Properties

Hollandite

Yttrium Aluminium Garnet

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1 Optical Properties

1.1 Luster

Not Available

1.2 Pleochroism

Weak.

Not Available

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Not Available

Gemmological Tables (2004)

1.5 Refractive Index

Not Available1.833

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

monoclinic

Not Available

1.8 Birefringence

Not AvailableNot Available

0 0.296

1.9 Clarity

Not Available

TransparentUlrich Henn and Claudio C. Milisenda

Hollandite and Yttrium Aluminium Garnet Optic Character

Hollandite and Yttrium Aluminium Garnet optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Hollandite and Yttrium Aluminium Garnet 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 Hollandite and Yttrium Aluminium Garnet 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.

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Hollandite and Yttrium Aluminium Garnet Transparency

Similar to their colors, Hollandite and Yttrium Aluminium Garnet 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, Hollandite is Not Available while Hollandite is Not Available in appearance.