Hollandite and Euclase Optical Properties

Hollandite

Euclase

Add ⊕

1 Optical Properties

1.1 Luster

Not Available

Vitreous

1.2 Pleochroism

Weak.

Weak: colorless-(greenish) yellow

1.3 Dispersion

NA0.02

0.007 1

1.4 Transparency

Not Available

Gemmological Tables (2004) More from other references

1.5 Refractive Index

Not Available1.650-1.677

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

monoclinic

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

1.8 Birefringence

Not Available0.019-0.025

0 0.296

1.9 Clarity

Not Available

TransparentUlrich Henn and Claudio C. Milisenda

Hollandite and Euclase Optic Character

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

Hollandite Vs Larvikite

Hollandite Vs Musgravite

Hollandite Vs Falcons Eye

Hollandite and Euclase Transparency

Similar to their colors, Hollandite and Euclase 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, Hollandite is Not Available while Hollandite is Not Available in appearance.