Gahnospinel and Apophyllite KF Optical Properties

Gahnospinel

Apophyllite KF

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1 Optical Properties

1.1 Luster

Vitreous

Vitreous, Pearly

1.2 Pleochroism

AbsentWalter Schumann

Not Available

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Gemmological Tables (2004)

Not Available

1.5 Refractive Index

1.735-1.7901.530-1.536

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Isometric

tetragonal

1.8 Birefringence

Not AvailableNot Available

0 0.296

1.9 Clarity

TransparentUlrich Henn and Claudio C. Milisenda

Not Available

Gahnospinel and Apophyllite KF Optic Character

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

Similar to their colors, Gahnospinel and Apophyllite KF 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, Gahnospinel is Gemmological Tables (2004) while Gahnospinel is Gemmological Tables (2004) in appearance.