
gemstone
Carved red coral bead (likely coral or coral-colored resin)
Corallium spp. (precious coral; calcium carbonate, CaCO₃)
AI-generated identification · may be incorrectRed, opaque, matte-to-waxy luster, hardness about 3–4 Mohs, and no visible crystal structure; the intricate raised pattern is carved. The image alone cannot exclude dyed bone, resin, or plastic imitation.
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Physical properties
Red, opaque, matte-to-waxy luster, hardness about 3–4 Mohs, and no visible crystal structure; the intricate raised pattern is carved. The image alone cannot exclude dyed bone, resin, or plastic imitation.
Formation & geological history
Precious coral forms as aragonite skeletons of colonial marine organisms in deep, rocky Mediterranean and Pacific waters; growth is extremely slow, typically over decades to centuries. It is biological rather than an igneous, sedimentary, or metamorphic rock.
Uses & applications
Used for beads, jewelry, ornaments, and carvings; genuine coral is a regulated marine material. Construction use is negligible.
Geological facts
Natural coral commonly shows tiny pores, growth lines, and color variation; uniform bright red color and unusually light weight may indicate dye or resin. Acid testing can damage it and should be done only by a professional.
Field identification & locations
Check under magnification for organic pores and layered growth, and use a gemologist’s spectroscopy or density testing for confirmation; common sources include the Mediterranean, Japan, Taiwan, and the Pacific. Avoid heat, acids, and harsh chemicals.
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