gemstone
Ruby
Corundum (Al2O3:Cr)
AI-generated identification · may be incorrectHardness of 9 on the Mohs scale, vivid red color due to chromium impurities, adamantine to vitreous luster, and trigonal crystal system.
Identified More gemstone →
Explore Ruby in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness of 9 on the Mohs scale, vivid red color due to chromium impurities, adamantine to vitreous luster, and trigonal crystal system.
Formation & geological history
Forms in metamorphic and igneous rocks, typically within marble deposits or basaltic terrains, over millions of years.
Uses & applications
Highly valued for fine jewelry, luxury timepieces, and formerly for laser technology.
Geological facts
Finest rubies traditionally originate from the Mogok Valley in Myanmar and command exceptional auction prices.
Field identification & locations
Identified by extreme hardness, distinct red fluorescence under UV light, and lack of cleavage.
More like this
Other gemstone specimens
Gemstone Ring
N/A - Set piece of jewelry, likely Amethyst or Garnet with Diamond or CZ
gemstone
Ammolite
Ammolite (Biogenic Aragonite with trace elements; fossils of Placenticeras meeki and Placenticeras intercalare)
mineral
Topaz
Al2SiO4(F,OH)2
mineral
Amber
Succinite (Organic Gemstone)
mineral
Diamond and Gold Jewelry
Carbon (Diamond) / Au (Gold)
gemstone
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary