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Fire Opal
Fire Opal

Danburite
Danburite



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Fire Opal
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Danburite

Fire Opal and Danburite Optical Properties

1 Optical Properties
1.1 Luster
Not Available
Vitreous, Greasy
1.2 Pleochroism
AbsentWalter Schumann
Weak: pale yellow yellow
1.3 Dispersion
Albite Optical ..
None
Rank: N/A (Overall)
0.02
Rank: 22 (Overall)
Fluorite Optical Properties
1.4 Transparency
Transparent, Translucent
Gemmological Tables (2004) More from other references
1.5 Refractive Index
1.370-1.470
1.627-1.639
1.6 Optic Character
Not Available
Biaxial/+
1.7 Crystal System
Amorphous
Orthorhombic
1.8 Birefringence
Not Available
0.006
1.9 Clarity
Transparent
TransparentUlrich Henn and Claudio C. Milisenda

Fire Opal and Danburite Optic Character

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

Fire Opal and Danburite Transparency

Similar to their colors, Fire Opal and Danburite 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, Fire Opal is Translucent and Transparent while Fire Opal is Translucent and Transparent in appearance.