Rhodochrosite and Phlogopite Optical Properties

Rhodochrosite

Phlogopite

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1 Optical Properties

1.1 Luster

Vitreous

Pearly

1.2 Pleochroism

Weak

Not Available

1.3 Dispersion

0.02NA

0.007 1

1.4 Transparency

Transparent, Opaque, Transparent to nearly opaque

Not Available

1.5 Refractive Index

1.601.530-1.573

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Trigonal

monoclinic

1.8 Birefringence

0.208-0.2200.0280-0.0450

0 0.296

1.9 Clarity

Transparent to nearly opaque

Not Available

Rhodochrosite and Phlogopite Optic Character

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

Similar to their colors, Rhodochrosite and Phlogopite 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, Rhodochrosite is Opaque, Transparent and Transparent to nearly opaque while Rhodochrosite is Opaque, Transparent and Transparent to nearly opaque in appearance.