en_tn_condensed/exo/28/20.md

ruby ... jasper

These are precious stones. (See: rc://en/ta/man/translate/translate-unknown)

onyx

This is a valuable stone that has layers of white and black, red or brown. See how you translated these in Exodus 25:7. (See: rc://en/ta/man/translate/translate-unknown)

They must be mounted in gold settings

This can be stated in active form. AT: "You must mount them in gold settings" (See: rc://en/ta/man/translate/figs-activepassive)