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.
The fourth, a Turquoise, Onyx and Jasper. And they shall be set in gold in their enclosures.
And they made boards for the dwelling place of sethim-wood that stood upright,
The fourth row: a Turquoise, an Onyx and a Jasper - closed in ouches of gold in their enclosures.
Thou hast been in the pleasure garden of God; thou art decked with all manner of precious stones: with Ruby, Topaz, Crystal, Jacinth, Onyx, Jasper, Sapphire, Smaragdus, Carbuncle, and gold. Thy beauty and the holes that be in thee were set forth in the day of thy creation.
the fifth sardonyx: the sixth sardius: the seventh chrysolite: the eighth beryl: the ninth a topaz: the tenth a chrysoprasus: the eleventh a jacinth: the twelfth an amethyst.