The intended visual is a smooth black chalcedony pebble; solid colour is not proof of untreated material.
Material and appearance
Black chalcedony sold as onyx; treatment to be disclosed. The intended visual is even black glossy chalcedony pebble with a faint lighter edge. A rounded organic outline and a polished surface are the design, rather than a calibrated bead, cabochon or faceted gemstone. Pattern, translucency and shape can vary between pieces.
Identity and treatment
Many commercial black onyx items are colour treated; do not promise naturally uniform black colour. The material identity and treatment statement should refer to the supplied batch. A representative image does not identify a specimen, verify an origin or establish an untreated condition.
Configuration and selection
The described configuration is one tumble-polished specimen. Compare packs or larger pieces only where the final offer lists those choices explicitly. Shape is irregular rather than calibrated. The design uses a proposed 20–30 mm length band; actual dimensions and net weight belong in the confirmed product specifications. No mining origin or laboratory certification is asserted without item-specific evidence.
Care and handling
Avoid solvents and strong sunlight where dye or impregnation is present. Keep the pebble in its own soft pocket during transport. Keep small stones away from children and pets. Use as a decorative or study specimen; do not put minerals in food or drinking water or perform destructive home tests.
Buying questions
Will my stone match the photograph?
The supplied visuals represent the intended appearance. Actual stock can differ in shape, inclusions and pattern; compare the approved stock images and final batch specifications before choosing.
Is the material verified untreated?
Many commercial black onyx items are colour treated; do not promise naturally uniform black colour.
Three useful guides
