Mottramite and Omphacite Optical Properties

Mottramite

Omphacite

Add ⊕

1 Optical Properties

1.1 Luster

Greasy

Vitreous

1.2 Pleochroism

Visible X=Y= canary yellow to greenish yellow

Weak: colorless -- very pale green -- very pale green

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Not Available

TranslucentAnthony et al, Handbook of mineralogy (2001)

1.5 Refractive Index

2.1701.662-1.723

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Orthorhombic

Not Available

1.8 Birefringence

0.150Not Available

0 0.296

1.9 Clarity

Not Available

TranslucentAnthony et al

Mottramite and Omphacite Optic Character

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

Compare Brown Gemstones

Mottramite Vs Shigaite

Mottramite Vs Richterite

Mottramite Vs Super Seven Crystals

Mottramite and Omphacite Transparency

Similar to their colors, Mottramite and Omphacite 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, Mottramite is Not Available while Mottramite is Not Available in appearance.