Phosgenite and Star Sapphire Optical Properties

Phosgenite

Star Sapphire

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1 Optical Properties

1.1 Luster

Adamantine

Not Available

1.2 Pleochroism

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

Not Available

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Gemmological Tables (2004) More from other references

Transparent, Translucent

1.5 Refractive Index

2.117-2.1451.758-1.780

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

tetragonal

Not Available

1.8 Birefringence

0.0270.007-0.010

0 0.296

1.9 Clarity

TransparentUlrich Henn and Claudio C. Milisenda

Transparent

Phosgenite and Star Sapphire Optic Character

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

Similar to their colors, Phosgenite and Star Sapphire 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.