Goethite and Rosasite Optical Properties

Goethite

Rosasite

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1 Optical Properties

1.1 Luster

Adamantine

Silky, Vitreous

1.2 Pleochroism

VisibleArthur Thomas

Strong: X = pale emerald green or colourless; Y = dark emerald green or pale blue; Z = dark emerald green or pale blue

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Gemstones (2009)

Not Available

1.5 Refractive Index

2.26-2.3981.672-1.688

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Orthorhombic

monoclinic

1.8 Birefringence

0.1380.139-0.143

0 0.296

1.9 Clarity

Gemstones (2009)

Not Available

Goethite and Rosasite Optic Character

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

Similar to their colors, Goethite and Rosasite 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.