Goethite and Catapleiite Optical Properties

Goethite

Catapleiite

Add ⊕

1 Optical Properties

1.1 Luster

Adamantine

Vitreous

1.2 Pleochroism

VisibleArthur Thomas

Not Available

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Gemstones (2009)

TransparentUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004)

1.5 Refractive Index

2.26-2.3981.590-1.629

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Orthorhombic

Monoclinic Prismatic H-M Symbol (2/m) Space Group: B2/b (pseudo-HEX)

1.8 Birefringence

0.1380.039

0 0.296

1.9 Clarity

Gemstones (2009)

TransparentUlrich Henn and Claudio C. Milisenda

Goethite and Catapleiite Optic Character

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

Goethite Vs Jacobsite

Goethite Vs Kyanite Cyprine

Goethite Vs Jadeite

Goethite and Catapleiite Transparency

Similar to their colors, Goethite and Catapleiite 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.