Agates, eh? I appreciate your answers. I like these beads a lot but I'm unsure if they are all agates on my strands.

Some of the ones you show have rounded edges, maybe from wear.
Most of the beads on my strands have 1 very flat end, usually the flat side is also the layer that is darker than the white body of the bead. The white body varies in whitenes. Some are grey-white, like many agates but some are chalk white, an uncommon color for agates.

The holes are fairly uniform, about 1.5mm. Some show tear out on one end from drilling.

A few beads look like brownlip shell. Some like agates but others more like glass imitating shell and agate. I'll have to spend more time with a loup and bright light.

Let me ask about the metal beads mixed in with your beads, Joyce. The metal beads with 3 dots between bars. I've seen new and old ones of these but typically from Sudan or even Kenya. What can you tell me about these "vertebrae" looking metal beads?