Onyx
Onyx is an opaque banded variety of chalcedony mineral, commonly black or white, sold as tumbled stones, polished pieces, or small crystals in the fossils and minerals market.
Estimated value as of 2026 · Source: Average from tumbled/polished onyx stones on Etsy, GemSelect, and crystal retail…
Fun Fact
Onyx was historically used in ancient cameos and intaglios because its layered colors allowed skilled artisans to carve contrasting images.
Price History
More in Nature
Dog Collar
A dog collar is a band worn around a dog's neck, typically made of nylon or leather, used for identification, control, and attaching leashes.
Stepping Stone
A garden stepping stone is a decorative concrete or stone paver used to create pathways through lawns, gardens, or patios, often featuring embossed designs like flowers, animals, or verses.
Fossil Tyrannosaurus Rex Skeleton (Stan)
Nearly complete T-Rex skeleton auctioned for research and display.
Californium-252 (per gram)
Rare synthetic element produced in nuclear reactors, the rarest element in practical use.