The oldest Chinese carvings made from this gem are simple tools & amulets
Magatama - Wikipedia  Magatama (), less frequently (), are curved, comma-shaped beads that appeared in prehistoric Japan from the Final Jmon period through the Kofun period, approximately ca. 1,000 BC to the 6th century AD. The beads, also described as jewels, were made of primitive stone and .... (Adapted from Tsunoda and Goodrich, Japan and the Chinese dynastic...
Saturday JEOPARDY - Forums Forums - Off Topic Forum FUN  ($2000)- Archaeologists learn about a culture by studying broken pieces of earthenware called this... [what are Shards ? ] Double JEOPARDY-...