Citrine SNT 060.
Lauscha citrine is a transparent amber. Like other amber glass, it is reactive with silver.
Here are plain and etched spacers, plus a white round encased in citrine. (I let the core get too hot when encasing, so it smeared. Bad beadmaker, no bikkit!)
I made citrine and iris gold frit stringer for the two new beads here, used it to make the core and then encased. The bead in the middle was encased with 101 soft clear. The bead on the left was encased with 100 clear and was from a very thin section of the stringer, so the wraps were tiny and much closer together. I've caught a lot of bubbles in that one.
A citrine cone with silver leaf, then citrine with silver leaf, reduced and encased in soft clear 101 and crunched. You can see the reaction and extra sheen as a result of adding the silver.