Gem-ID.com

Gemstone Identification Database

Filter Properties

Color

Mohs Hardness

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Refractive Index (RI)

to

Specific Gravity (SG)

to

Birefringence

to

Optic Character

Singly Refractive (SR) Doubly Refractive (DR) Aggregate (AGG)

Anomalous Double Refraction (ADR)

Uniaxial / Biaxial

Uniaxial Biaxial

Optical Sign

Positive (+) Negative (-)

Isotropic / Anisotropic

Isotropic Anisotropic

Pleochroism

None Dichroic Trichroic

UV Fluorescence/Phosphorescence

Color-Change Phenomena

Crystal System

All

Cubic

Hexagonal

Tetragonal

Orthorhombic

Monoclinic

Triclinic

Trigonal

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