gemstone
Ruby ring
Corundum (Al₂O₃), red variety colored mainly by chromium
AI-generated identification · may be incorrectThe ring holds a polished, oval red gemstone in a silver-colored setting. Ruby has Mohs hardness 9, vitreous luster, and a trigonal crystal structure; the stone’s internal features and possible treatments cannot be confirmed from the photo.
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Physical properties
The ring holds a polished, oval red gemstone in a silver-colored setting. Ruby has Mohs hardness 9, vitreous luster, and a trigonal crystal structure; the stone’s internal features and possible treatments cannot be confirmed from the photo.
Formation & geological history
Rubies form in aluminum-rich, silica-poor metamorphic rocks or in some igneous settings. Natural stones span a wide range of geological ages; origin and age cannot be determined visually here.
Uses & applications
Used in jewelry and as a collectible gemstone; synthetic corundum also has industrial applications.
Geological facts
Ruby is one of the traditional four precious gemstones. Asterism can occur in some rubies, producing a star-like effect when cut as a cabochon.
Field identification & locations
The vivid red color and jewelry cut are consistent with ruby, but glass, synthetic corundum, and treated or composite stones can look similar. Gemological testing is needed to establish identity, natural origin, and treatment.
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