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Goethite
Goethite

Antigorite
Antigorite



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Goethite
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Antigorite

Goethite and Antigorite Optical Properties

1 Optical Properties
1.1 Luster
Adamantine
Waxy, Silky, Resinous, Greasy
1.2 Pleochroism
VisibleArthur Thomas
pale greenish yellow.
1.3 Dispersion
NANA
Fluorite Optical Properties
0.007 1
1.4 Transparency
Gemstones (2009)
Translucent
1.5 Refractive Index
2.26-2.3981.530-1.575
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Orthorhombic
Monoclinic Domatic H-M Symbol (m) Space Group: Cm
1.8 Birefringence
0.138Not Available
Achroite
0 0.296
1.9 Clarity
Gemstones (2009)
Translucent

Goethite and Antigorite Optic Character

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

Goethite and Antigorite Transparency

Similar to their colors, Goethite 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, Goethite is Gemstones (2009) while Goethite is Gemstones (2009) in appearance.