gemstone
Ruby
Corundum (Al2O3:Cr)
AI-generated identification · may be incorrectHardness of 9 on the Mohs scale, vivid red color due to chromium traces, 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 traces, adamantine to vitreous luster, and trigonal crystal system.
Formation & geological history
Formed in metamorphic or igneous environments under high temperature and pressure, often found in marble deposits or alluvial gravels.
Uses & applications
Extensively used in high-end jewelry, luxury watches, and laser technology.
Geological facts
Ruby is one of the traditional cardinal gems, with the red color caused by chromium substituting for aluminum in the crystal lattice.
Field identification & locations
Identified by its extreme hardness, red fluorescence under UV light, and distinctive hexagonal barrel-shaped crystals when uncut.
More like this
Other gemstone specimens
Ammolite
Ammolite (Biogenic Aragonite with trace elements; fossils of Placenticeras meeki and Placenticeras intercalare)
mineral
Gemstone Ring
N/A - Set piece of jewelry, likely Amethyst or Garnet with Diamond or CZ
gemstone
Amber
Succinite (Organic Gemstone)
mineral
Diamond and Gold Jewelry
Carbon (Diamond) / Au (Gold)
gemstone
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Pearl necklace
Pearl, primarily aragonite (CaCO₃) and conchiolin
gemstone