Plumbogummite and Staurolite Optical Properties

Plumbogummite

Staurolite

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1 Optical Properties

1.1 Luster

Resinous

1.2 Pleochroism

None

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

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Not Available

Blue Chart Gem Identification (2010) More from other references

1.5 Refractive Index

1.653-1.6881.736-1.762

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Trigonal

monoclinic

1.8 Birefringence

Not Available0.009-0.015

0 0.296

1.9 Clarity

Not Available

Blue Chart Gem Identification (2010) More from other references

Plumbogummite and Staurolite Optic Character

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

Similar to their colors, Plumbogummite 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, Plumbogummite is Not Available while Plumbogummite is Not Available in appearance.