Aventurine and Almandine Optical Properties

Aventurine

Almandine

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1 Optical Properties

1.1 Luster

Vitreous

Greasy, Vitreous

1.2 Pleochroism

AbsentWalter Schumann

None

1.3 Dispersion

None0.03

0.007 1

1.4 Transparency

Translucent, Opaque . May be translucent when backlit on the edges.

Gemmological Tables (2004) More from other references

1.5 Refractive Index

1.544-1.5531.770-1.820

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Trigonal

cubic

1.8 Birefringence

0.007-0.010Not Available

0 0.296

1.9 Clarity

Translucent

TransparentUlrich Henn and Claudio C. Milisenda

Aventurine and Almandine Optic Character

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

Similar to their colors, Aventurine and Almandine 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, Aventurine is Opaque . May be translucent when backlit on the edges. and Translucent while Aventurine is Opaque . May be translucent when backlit on the edges. and Translucent in appearance.