It's very good to see you here again. These are two very nice early pieces.

The agate bead reminded me at once of a jade bead from Ban Chiang in Thailand that I've shown here before. It's almost the same length as yours (10.2 cm) made of a dark green almost black jade (pictures attached here). It might have been made in Phung Nguyen in northern Vietnam and is quite early, dating from around 2,000BCE. Your bead is a beautiful dark stone also, and it could be from Vietnam too, but from further south and probably later - say, 300BCE to 400CE. From the placing of them in graves we know that these long tubular beads must have been worn high up on the throat.

At first your rock crystal penannular slit ring made me think of two ear ornaments from Vietnam, one jade, one crystal, that date from the Dong Son period, late first millennium BCE. But as I compare them the form of yours is rather different. The Dong Son rings are quite sharply cut on the inside with a bevelled slope on the exterior. I'll attach images of them to the next post.

Then I remembered a stone slit ring I got quite a long time ago in Guangzhou. I was told it was from the south and from the Warring States period, which would fit with what you say about yours. It's closer in form to yours, too, with a bevelled slope on the inside and a rounded exterior.

It's interesting that these rings which are found at the same time in a number of different places can vary in their details depending on the specific culture that produced them.

All the best,

Will