Euclase and Dumortierite Optical Properties

Euclase

Dumortierite

Add ⊕

1 Optical Properties

1.1 Luster

Vitreous

1.2 Pleochroism

Weak: colorless-(greenish) yellow

Strong; X = deep blue or violet; Y = yellow to red-violet or nearly colorless; Z = colorless or very pale blue

1.3 Dispersion

0.02None

0.007 1

1.4 Transparency

Gemmological Tables (2004) More from other references

Translucent, Translucent to opaque

1.5 Refractive Index

1.650-1.6771.669-1.723

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Monoclinic Prismatic H-M Symbol (2/m) Space Group: P 21/a

Orthorhombic

1.8 Birefringence

0.019-0.0250.011-0.037

0 0.296

1.9 Clarity

TransparentUlrich Henn and Claudio C. Milisenda

Translucent

Euclase and Dumortierite Optic Character

Euclase and Dumortierite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Euclase and Dumortierite 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 Euclase and Dumortierite 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 Green Gemstones

Euclase Vs Garnet

Euclase Vs Forsterite

Euclase Vs Fuchsite

Euclase and Dumortierite Transparency

Similar to their colors, Euclase and Dumortierite 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, Euclase is Gemmological Tables (2004) More from other references while Euclase is Gemmological Tables (2004) More from other references in appearance.