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Bertrandite
Bertrandite

Citrine
Citrine



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Bertrandite
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Citrine

Bertrandite and Citrine Optical Properties

1 Optical Properties
1.1 Luster
Vitreous
Vitreous
1.2 Pleochroism
none.
Natural: weak; yellow light yellow.
1.3 Dispersion
NA0.01
Fluorite Optical Properties
0.007 1
1.4 Transparency
TransparentAnthony et al, Handbook of mineralogy (2001)
Transparent
1.5 Refractive Index
1.583-1.6141.544-1.553
Agate Opal
1 3.25
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Orthorhombic Pyramidal H-M Symbol (mm2) Space Group: Ccm21
Trigonal
1.8 Birefringence
Not Available0.009
Achroite
0 0.296
1.9 Clarity
TransparentAnthony et al
Transparent

Bertrandite and Citrine Optic Character

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

Bertrandite and Citrine Transparency

Similar to their colors, Bertrandite 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, Bertrandite is Handbook of mineralogy (2001) and TransparentAnthony et al while Bertrandite is Handbook of mineralogy (2001) and TransparentAnthony et al in appearance.