Ettringite and Rosasite Optical Properties

Ettringite

Rosasite

Add ⊕

1 Optical Properties

1.1 Luster

Vitreous

Silky, Vitreous

1.2 Pleochroism

Not Available

Strong: X = pale emerald green or colourless; Y = dark emerald green or pale blue; Z = dark emerald green or pale blue

1.3 Dispersion

NANA

0.007 1

1.4 Transparency

Transparent, Translucent

Not Available

1.5 Refractive Index

1.470-1.4911.672-1.688

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Trigonal

monoclinic

1.8 Birefringence

0.0210.139-0.143

0 0.296

1.9 Clarity

Transparent

Not Available

Ettringite and Rosasite Optic Character

Ettringite and Rosasite optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Ettringite and Rosasite 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 Ettringite and Rosasite 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 Yellow Gemstones

Ettringite Vs Forsterite

Ettringite Vs Garnet

Ettringite Vs Gadolinium Gallium Garnet

Ettringite and Rosasite Transparency

Similar to their colors, Ettringite and Rosasite 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, Ettringite is Translucent and Transparent while Ettringite is Translucent and Transparent in appearance.