Boulder Opal and Staurolite Optical Properties

Boulder Opal

Staurolite

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1 Optical Properties

1.1 Luster

Not Available

Resinous

1.2 Pleochroism

AbsentWalter Schumann

X = colorless; Y = pale yellow; Z = golden yellow

1.3 Dispersion

NoneNA

0.007 1

1.4 Transparency

Transparent, Translucent

Blue Chart Gem Identification (2010) More from other references

1.5 Refractive Index

1.370-1.4701.736-1.762

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Not Available

monoclinic

1.8 Birefringence

Not Available0.009-0.015

0 0.296

1.9 Clarity

Transparent

Blue Chart Gem Identification (2010) More from other references

Boulder Opal and Staurolite Optic Character

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

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Boulder Opal Vs Chrome-Chalcedony

Boulder Opal and Staurolite Transparency

Similar to their colors, Boulder Opal and Staurolite 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.