Garnet · Variety of Garnet
Demantoid
Vivid green to yellowish green
Green
Optical characteristics
- Ref. index
- 1.88 – 1.888
- Luster
- Vitreous to adamantine
- Pleochroism
- None None; garnets are singly refractive and isotropic.
- Fluorescence
- Usually inert.
Source localities
Russia
Russia: Ural Mountains / Siberia
Legendary
★ Top Source
Classic source for alexandrite, demantoid, diamond and nephrite.
Namibia
Namibia: Erongo / Green Dragon area
Notable
Known for demantoid, spessartite and collector minerals.
Italy
Italy: Val Malenco / alpine localities
Notable
Known for demantoid and collector minerals.
Inclusions & features
Crystals Crystal Inclusions
Under 10x loupe: solid, well-formed mineral crystals trapped inside the host gem. They may…
Fractures Feathers and Fractures
Under 10x loupe: irregular internal surfaces that catch light and appear bright, wing-like, or…
Fractures Fingerprint Inclusions
Under 10x loupe: curved or wavy lines of tiny dots forming patterns that look…
Needles Horsetail Inclusions
Under 10x loupe: fan-shaped or radiating bundles of pale yellowish fibers all emerging from…
Clouds Pinpoint Clouds
Under 10x loupe: concentrations of extremely tiny bright dots that individually are too small…
Multiphase Two-Phase Inclusions
Under 10x loupe: a transparent irregular cavity containing both a liquid phase and a…
Instruments used
Immersion Microscope
See every internal detail clearly, the professional standard
10x Loupe
Your most-used instrument, start every examination here
Polariscope
Determines single vs. double refraction, quick and conclusive
Refractometer
Measures refractive index, the backbone of gem identification
Spectroscope
Reads characteristic absorption lines, confirms chromium, iron, copper
UV Lamp, Long Wave and Short Wave
Fluorescence exposes treatments, synthetics, and origin