Rosasite and Amblygonite Optical Properties

Rosasite

Amblygonite

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1 Optical Properties

1.1 Luster

Silky, Vitreous

Vitreous, Pearly

1.2 Pleochroism

Strong: X = pale emerald green or colourless; Y = dark emerald green or pale blue; Z = dark emerald green or pale blue

weak to none

1.3 Dispersion

NA0.01

0.007 1

1.4 Transparency

Not Available

Gemmological Tables (2004) More from other references

1.5 Refractive Index

1.672-1.6881.578-1.646

1 3.25

1.6 Optic Character

Not Available

Biaxial/+

1.7 Crystal System

monoclinic

Triclinic

1.8 Birefringence

0.139-0.1430.020-0.030

0 0.296

1.9 Clarity

Not Available

TransparentUlrich Henn and Claudio C. Milisenda

Rosasite and Amblygonite Optic Character

Rosasite and Amblygonite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Rosasite and Amblygonite 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 Rosasite and Amblygonite 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. Amblygonite has Biaxial/+ character.

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Rosasite and Amblygonite Transparency

Similar to their colors, Rosasite and Amblygonite 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, Rosasite is Not Available while Rosasite is Not Available in appearance.