Yisaskhar (Yisaskhar goes to Wikipedia at this point) (Order of birth Gen 30:14, 15, 16, 17, 18; Yisra'el/Israel's blessing Gen 49:14, 15)
Breastplate stone amethyst, silicon dioxide (?+SiO2+Fe4+ [irradiated]=56+), there are transition elements and other large trace elements mixed with the silicon dioxide