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 fifth, of sardonyx; the sixth, of sardius; the seventh, of chrysolite; the eighth, of beryl; the ninth, of a topaz; the tenth, of a chrysoprasus; the elventh, of a jacinth; the twelfth, of an amethyst.