Boulder Opal and Fayalite Optical Properties

Boulder Opal

Fayalite

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1 Optical Properties

1.1 Luster

Not Available

Vitreous, Resinous

1.2 Pleochroism

AbsentWalter Schumann

Faint

1.3 Dispersion

NoneNA

0.007 1

1.4 Transparency

Transparent, Translucent

TransparentAnthony et al, Handbook of mineralogy (2001)

1.5 Refractive Index

1.370-1.4701.827-1.879

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Not Available

Orthorhombic

1.8 Birefringence

Not Available0.042-0.051

0 0.296

1.9 Clarity

Transparent

TransparentAnthony et al

Boulder Opal and Fayalite Optic Character

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

Similar to their colors, Boulder Opal and Fayalite 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, Boulder Opal is Translucent and Transparent while Boulder Opal is Translucent and Transparent in appearance.