While it cannot be regarded as certain that whenever Shakespeare writes of jewels or of rings he means those in which precious stones were set, several of the passages more or less clearly indicate this, and we therefore present here the more characteristic of the lines in question:
A Death's face in a ring. Love's Labour's Lost, Act v, sc. 2, l. 616.
"Comedies", p. 142, col. A, line 36.
The dearest ring in Venice will I give you. Merchant of Venice, Act iv, sc. 1, l. 435.
"Comedies", p. 181, col. B, line 27.
Diana. O behold this ring Whose high respect and rich validity Did lack a parallel; yet for all that He gave it to a commoner of the camp, If I be one.
Count. He blushes, and 'tis it: Of six preceding ancestors, that gem, Conferr'd by testament to the sequent issue, Hath it been owned and worn. All's Well That Ends Well, Act v, sc. 3, l. 191-198.
"Comedies", p. 253, col. A, lines 1-8.
My daughter! O my ducats! O my daughter! Fled with a Christian! O my Christian ducats! Justice! the law! my ducats and my daughter! A sealed bag, two sealed bags of ducats, Of double ducats, stolen from me by my daughter! And jewels, two stones, two rich and precious stones, Stolen by my daughter! Justice! find the girl; She hath the stones upon her, and the ducats. Merchant of Venice, Act ii, sc. 8, l. 15-22.
"Comedies", p. 171, col. B, lines 23-30.
I would my daughter were dead at my foot, and the jewels in her ear! Merchant of Venice, Act iii, sc. 1, l. 92.
"Comedies", p. 173, col. B, lines 1, 2.
Sweet are the uses of adversity, Which, like the toad, ugly and venomous, Wears yet a precious jewel in his head. As You Like It, Act ii, sc. 1, l. 13-15.
"Comedies", p. 190, col. A, lines 10-12.
Win her with gifts, if she respect not words: Dumb jewels often in their silent kind More than quick words do move a woman's mind. Two Gentlemen of Verona, Act iii, sc. 1, l. 89-91.
"Comedies", p. 29, col. A, lines 63-65.