Fluorapatite and Rosasite Optical Properties

Fluorapatite

Rosasite

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1 Optical Properties

1.1 Luster

Vitreous, Resinous

Silky, Vitreous

1.2 Pleochroism

Weak to strong if coloreD

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

Transparent

Not Available

1.5 Refractive Index

1.631-1.6501.672-1.688

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Hexagonal

monoclinic

1.8 Birefringence

Not Available0.139-0.143

0 0.296

1.9 Clarity

Transparent

Not Available

Fluorapatite and Rosasite Optic Character

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

Similar to their colors, Fluorapatite 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, Fluorapatite is Transparent while Fluorapatite is Transparent in appearance.