Amber

(Ezek. 1:4, 27; 8:2. Heb., hashmal, rendered by the LXX.
elektron, and by the Vulgate electrum), a metal compounded of
silver and gold. Some translate the word by "polished brass,"
others "fine brass," as in Rev. 1:15; 2:18. It was probably the
mixture now called electrum. The word has no connection,
however, with what is now called amber, which is a gummy
substance, reckoned as belonging to the mineral kingdom though
of vegetable origin, a fossil resin.