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Malachite
Malachite

Citrine
Citrine



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Malachite
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Citrine

Malachite and Citrine Optical Properties

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Optical Properties

Luster

Adamantine, Vitreous, Silky
Vitreous

Pleochroism

-
Natural: weak; yellow light yellow.

Dispersion

0.040.01
0.005 1
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Transparency

Opaque
Transparent

Refractive Index

1.655-1.9091.544-1.553
1 3.25
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Optic Character

-
-

Crystal System

monoclinic
Trigonal

Birefringence

0.2540.009
0 0.296
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Clarity

-
Transparent

Malachite and Citrine Optic Character

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

Malachite and Citrine Transparency

Similar to their colors, Malachite and Citrine 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, Malachite is Opaque while Malachite is Opaque in appearance.