Probably the ancient topaz of a golden colour. Re 21:20. The Greek word ?????????? occurs in the LXX in Ex 28:20; 36:20 (Ex 39:13); Eze 28:13.
And the fourth row a beryl, an onyx, and a jasper; they shall be set in gold filigree.
And the fourth row a beryl, an onyx, and a jasper; they were enclosed in settings of gold filigree.
You were in Eden, the garden of God; every precious stone was your covering, the carnelian, topaz, jasper, chrysolite, beryl, onyx, sapphire, carbuncle, and emerald; and your settings and your sockets and engravings were wrought in gold. On the day that you were created they were prepared.
The fifth onyx, the sixth sardius, the seventh chrysolite, the eighth beryl, the ninth topaz, the tenth chrysoprase, the eleventh jacinth, the twelfth amethyst.