The topaz - The topaz is a precious stone, whose colors are yellow, green, blue, and red. Its natural place is in various primitive rocks, such as the topaz-rock, gneiss, and clay-slate. It is found in the granite and gneiss districts of Mar and Cairnaorta, in Cornwall, in Brazil, and in various other places. The most valuable stones of this kind now known are those which are found in Brazil. This gem is much prized by jewelers, and is considered as one of the more beautiful ornamental stones. The Hebrew word פטדה pı̂ṭdâh, occurs in Exodus 28:17; Exodus 39:10; Ezekiel 28:13. and in this place only. It is uniformly rendered topaz. It is not improbable that the English word “topaz,” and the Greek τοπάζιον topazion, are derived from this, by a slight transposition of the letters - טפדה. The Vulgate and the Septuagint render this “topaz.”
Of Ethiopia - Hebrew כוּשׁ kûsh - “Cush.” Coverdale here renders it, “India.” On the meaning of this word, and the region denoted by it, see the notes at Isaiah 11:11. It may mean either the part of Africa now known as Ethiopia, or Abyssinia and Nubia; the southern part of Arabia, or the Oriental Cush in the vicinity of the Tigris. It is better, since the word has such ambiguity, to retain the original, and to translate it “Cush.” For anything that appears, this may have denoted, in the time of Job, the southern part of Arabia. It is known that the topaz was found there. Thus, Pliny says, Lib. xxxvii. 32, Reperta est - in Arabiae insula, quae Citis vocatur; in qua Troglodytae praedones, diutius fame - prossi cum herbas radicesque effoderant, eruerunt topazion.