Jeremejevite and Foitite Optical Properties

Jeremejevite

Foitite

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1 Optical Properties

1.1 Luster

Vitreous

1.2 Pleochroism

Colorless

Strong: pale lavender dark blueAnthony et al

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Gemmological Tables (2004) More from other references

TranslucentAnthony et al, Translucent

1.5 Refractive Index

1.638-1.650Not Available

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Hexagonal

Trigonal Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m

1.8 Birefringence

0.0130Not Available

0 0.296

1.9 Clarity

TransparentUlrich Henn and Claudio C. Milisenda

TranslucentAnthony et al

Jeremejevite and Foitite Optic Character

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

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