Spessartine and Antigorite Optical Properties

Spessartine

Antigorite

Add ⊕

1 Optical Properties

1.1 Luster

Vitreous

Waxy, Silky, Resinous, Greasy

1.2 Pleochroism

Not Available

pale greenish yellow.

1.3 Dispersion

0.03NA

0.007 1

1.4 Transparency

Gemmological Tables (2004) More from other references

Translucent

1.5 Refractive Index

1.789-1.8201.530-1.575

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Isometric

Monoclinic Domatic H-M Symbol (m) Space Group: Cm

1.8 Birefringence

0.027Not Available

0 0.296

1.9 Clarity

TransparentUlrich Henn and Claudio C. Milisenda

Translucent

Spessartine and Antigorite Optic Character

Spessartine and Antigorite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Spessartine and Antigorite 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 Spessartine and Antigorite 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 Red Gemstones

Spessartine Vs Triplite

Spessartine Vs Tortoiseshell

Spessartine Vs Tourmaline

Spessartine and Antigorite Transparency

Similar to their colors, Spessartine and Antigorite 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, Spessartine is Gemmological Tables (2004) More from other references while Spessartine is Gemmological Tables (2004) More from other references in appearance.