Albert Barnes Commentary Joshua 7:21

"when I saw among the spoil a goodly Babylonish mantle, and two hundred shekels of silver, and a wedge of gold of fifty shekels weight, then I coveted them, and took them; and, behold, they are hid in the earth in the midst of my tent, and the silver under it." — Joshua 7:21 (ASV)

A fine Babylonian garment - literally, “a robe or cloak of Shinar,” the plain in which Babylon was situated (Genesis 10:10). It was a long robe such as was worn by kings on state occasions (Jonah 3:6), and by prophets (1 Kings 19:13; Zechariah 13:4). The Assyrians were in early times famous for the manufacture of beautiful dyed and richly embroidered robes . That such a robe should be found in a Canaanite city is natural enough. The productions of the far East found their way through Palestine both southward toward Egypt and westward through Tyre to the countries bordering on the Mediterranean. (Compare Ezekiel 27:24 and the context.)

Wedge of gold - that is, some implement or ornament of gold shaped like a wedge or tongue. The name lingula was given by the Romans to a spoon and to an oblong dagger made in the shape of a tongue. The weight of this “wedge” was fifty shekels, that is, about twenty-five ounces (see Exodus 38:24 note). The silver was under the rest of the stolen property. The mantle would naturally be placed uppermost, and be used to cover up the others.