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 [is] a turquoise and an onyx and a jasper. Their settings will be woven [with] gold.
and the fourth row [was] a turquoise, an onyx, and a jasper. [They were] set [with] gold filigree settings in their mountings.
You were in Eden, the garden of God, and every precious stone [was] your adornment: carnelian, topaz and moonstone, turquoise, onyx and jasper, sapphire, malachite and emerald. And gold [was] the craftsmanship of your settings and your mountings in you; on the day when you were created they were prepared.
the fifth sardonyx, the sixth carnelian, the seventh chrysolite, the eighth beryl, the ninth topaz, the tenth chrysoprase, the eleventh jacinth, the twelfth amethyst.