Those are pieces of an onyx chess set. I used to have that exact set. Here’s an example from ebay: https://www.ebay.com/itm/276268677793?itmmeta=01HQGDMT5HNWBF8YNWTDN1Q1D5

I spilled chess pieces all over myself while in the parking lot getting in my car & a black teenager shouted “This brother playin’ chess!” And everybody laughed.

Chess pieces made out of stone. Stone is not recyclable or biodegradable or compostable. If you throw them in the landfill they will be there for millions of years. This is a pretty minor spill though.