Andalusite and Ferro-axinite Axinite-Fe Optical Properties

Andalusite

Ferro-axinite Axinite-Fe

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1 Optical Properties

1.1 Luster

Vitreous, Greasy

Vitreous

1.2 Pleochroism

strongly trichroic

Colorless

1.3 Dispersion

Albite Optical ..

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0.02

Rank: 23 (Overall)▶

Not Available

Rank: N/A (Overall)▶

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Fluorite Optical Properties

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0.044 (Anglesite Opt..)

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1.4 Transparency

Transparent, Translucent

Transparent

1.5 Refractive Index

1.627-1.650

1.674-1.693

1.6 Optic Character

Not Available

1.7 Crystal System

Orthorhombic

Triclinic Pinacoidal H-M Symbol ( 1) Space Group: P1

1.8 Birefringence

0.009-0.010

Not Available

1.9 Clarity

Transparent

Not Available

Andalusite and Ferro-axinite Axinite-Fe Optic Character

Andalusite and Ferro-axinite Axinite-Fe optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Andalusite and Ferro-axinite Axinite-Fe 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 Andalusite and Ferro-axinite Axinite-Fe 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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Andalusite and Ferro-axinite Axinite-Fe Transparency

Similar to their colors, Andalusite and Ferro-axinite Axinite-Fe 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, Andalusite is Translucent and Transparent while Andalusite is Translucent and Transparent in appearance.