Yours are a close match to these cross beads I recently acquired. I think mine might be green core too, but are more saturated with colorant and appear to be opaque black. The white cross with the dot in the center is on one side only. Sometimes the cross is tilted or messed up. I might have spotted a match in the Sick bead cards, but I have only the small jpegs, and the example is turned so I can't see the white cross.