Staurolite and Sunstone Optical Properties

Staurolite

Sunstone

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1 Optical Properties

1.1 Luster

Resinous

Vitreous

1.2 Pleochroism

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

Weak or absentWalter Schumann

1.3 Dispersion

NANone

0.007 1

1.4 Transparency

Blue Chart Gem Identification (2010) More from other references

Transparent, Translucent, Transparent to translucent

1.5 Refractive Index

1.736-1.7621.53-1.55

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

monoclinic

Triclinic

1.8 Birefringence

0.009-0.0150.007-0.010

0 0.296

1.9 Clarity

Blue Chart Gem Identification (2010) More from other references

Transparent to translucent

Staurolite and Sunstone Optic Character

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

Similar to their colors, Staurolite and Sunstone 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, Staurolite is Blue Chart Gem Identification (2010) More from other references while Staurolite is Blue Chart Gem Identification (2010) More from other references in appearance.