Definition of "jewel"

Iachimo: 'Tis plate of rare device, and jewels / Of rich and exquisite form, their values great.

1611 April (first recorded performance), William Shakespeare, “The Tragedie of Cymbeline”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, [Act I, scene vi], lines 188–9

Wel, wel (Meander) thou art deepely read:And hauing thee, I haue a iewell ſure:Go on my Lord, and giue your charge I ſay,Thy wit wil make vs Conquerors to day.

c. 1587–1588, [Christopher Marlowe], Tamburlaine the Great. […] The First Part […], 2nd edition, part 1, London: […] [R. Robinson for] Richard Iones, […], published 1592; reprinted as Tamburlaine the Great (A Scolar Press Facsimile), Menston, Yorkshire, London: Scolar Press, 1973, Act II, scene ii

Had our prince,—Jewel of children,—seen this hour, he had pair'dWell with this lord: there was not full a monthBetween their births.

c. 1610–1611 (date written), William Shakespeare, “The Winters Tale”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, [Act V, scene i]

The area between her eyebrows wrinkled with the increasing circular motions her two fingers made on her jewel.

2008, Another Time, Another Place: Five Novellas