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 was sardonyx [i.e., an orange-colored stone similar to chalcedony]; the sixth was sardius [i.e., a reddish-colored stone also called carnelian]; the seventh was chrysolite [i.e., a yellowish- or greenish-colored stone]; the eighth was beryl [i.e., a stone of bluish-green color]; the ninth was topaz [i.e., a yellow or bluish-yellow stone]; the tenth was chrysoprase [i.e., a stone of greenish-gold color]; the eleventh was jacinth [i.e., a stone of purple or reddish-blue color]; the twelfth was amethyst [i.e., a purple- or violet-colored stone].