Titanite and Fayalite Optical Properties

Titanite

Fayalite

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1 Optical Properties

1.1 Luster

Subadamantine, Resinous

Vitreous, Resinous

1.2 Pleochroism

Strong: X = nearly colorless; Y = yellow to green; Z = red to yellow-orange

Faint

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Not Available

TransparentAnthony et al, Handbook of mineralogy (2001)

1.5 Refractive Index

1.885-1.9901.827-1.879

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

monoclinic

Orthorhombic

1.8 Birefringence

0.105-0.1350.042-0.051

0 0.296

1.9 Clarity

Not Available

TransparentAnthony et al

Titanite and Fayalite Optic Character

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

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