Pearl and Jet Optical Properties

Pearl

Jet

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1 Optical Properties

1.1 Luster

Pearly

Waxy

1.2 Pleochroism

AbsentWalter Schumann

1.3 Dispersion

NoneNone

0.007 1

1.4 Transparency

Translucent, Opaque

Gemmological Tables (2004) More from other references

1.5 Refractive Index

1.52-1.661.640-1.680

1 3.25

1.6 Optic Character

Not Available

1.7 Crystal System

Orthorhombic

Amorphous

1.8 Birefringence

0.156Not Available

0 0.296

1.9 Clarity

Translucent

Gemmological Tables (2004) More from other references

Pearl and Jet Optic Character

Pearl and Jet optical properties play a significant role while distinguishing these gemstones from each other. These properties are influenced by the Pearl and Jet 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 Pearl and Jet 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 Blue Gemstones

Pearl Vs Prase

Pearl Vs Precious Opal

Pearl Vs Prase Opal

Pearl and Jet Transparency

Similar to their colors, Pearl and Jet 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, Pearl is Opaque and Translucent while Pearl is Opaque and Translucent in appearance.