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Thulite
Thulite

Boulder Opal
Boulder Opal



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Thulite
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Boulder Opal

Thulite and Boulder Opal Optical Properties

1 Optical Properties
1.1 Luster
Vitreous
Not Available
1.2 Pleochroism
Present
AbsentWalter Schumann
1.3 Dispersion
Albite Optical ..
Not Available
Rank: N/A (Overall)
None
Rank: N/A (Overall)
Fluorite Optical Properties
1.4 Transparency
Opaque, Translucent, Opaque . May be translucent in thin backlit sections.
Transparent, Translucent
1.5 Refractive Index
1.695
1.370-1.470
1.6 Optic Character
Not Available
Not Available
1.7 Crystal System
Orthorhombic
Not Available
1.8 Birefringence
0.006-0.018
Not Available
1.9 Clarity
OpaqueHerve Nicolas Lazzarelli
Transparent

Thulite and Boulder Opal Optic Character

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

Thulite and Boulder Opal Transparency

Similar to their colors, Thulite and Boulder Opal 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, Thulite is Opaque, Opaque . May be translucent in thin backlit sections. and Translucent while Thulite is Opaque, Opaque . May be translucent in thin backlit sections. and Translucent in appearance.