I suppose that most of these beads were made at Boshan, China, in the 20th C. The green beads, clearly, were made to imitate malachite. Odan has mistaken these for a series of older European trade beads, that have been discussed here many times (by me). I think we can take, for granted, that the Chinese beads were inspired by the European beads. Which would mean they post-date the trade beads. Also, an important factor is that the European beads are lampworked. Until the Boshan industries were devised and operating, the Chinese did not perform lampwork. (This is an approach they either learned from Germans who were local residents; or from the Japanese overseers who controlled Boshan glassworking until their expulsion.)

The white beads with multi-colored spots are very clearly Boshan lampwork beads.

Jamey