mineral
Black beaded bracelet, likely black onyx or glass
Possibly chalcedony (microcrystalline quartz, SiO₂); the beads may instead be man-made glass
AI-generated identification · may be incorrectGlossy black, rounded beads with metallic spacers; hardness would be about 6.5–7 Mohs if chalcedony, but appearance alone cannot distinguish it from glass or other materials. No visible crystal structure or cleavage.
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Physical properties
Glossy black, rounded beads with metallic spacers; hardness would be about 6.5–7 Mohs if chalcedony, but appearance alone cannot distinguish it from glass or other materials. No visible crystal structure or cleavage.
Formation & geological history
If natural chalcedony, it formed as silica precipitated in cavities in volcanic rocks; its age and source cannot be determined from the image. The bracelet is assembled and may contain non-geological beads.
Uses & applications
Jewelry and personal adornment.
Geological facts
The handwritten note appears to mention a black-on-black bracelet and silver-metal spacers, but does not establish the bead material.
Field identification & locations
A geological-material bracelet counts as a specimen, but this image does not confirm that the black beads are stone. Check for natural banding, inclusions, and cool feel; a gemologist or material test can distinguish chalcedony from glass.
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