Phosgenite and Rosasite Optical Properties

Phosgenite

Rosasite

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1 Optical Properties

1.1 Luster

Adamantine

Silky, Vitreous

1.2 Pleochroism

Weakly pleochroic with O reddish and E greenish in thick sections.

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

Gemmological Tables (2004) More from other references

Not Available

1.5 Refractive Index

2.117-2.1451.672-1.688

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

tetragonal

monoclinic

1.8 Birefringence

0.0270.139-0.143

0 0.296

1.9 Clarity

TransparentUlrich Henn and Claudio C. Milisenda

Not Available

Phosgenite and Rosasite Optic Character

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

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