Date: 1660

"Things that the least of drossy mixture hold, / Last longest; my Hearts flames Ætherial be, / More pure than seven times refined Gold / Than Cedar's flames: rays of a Deitie / They are."

— Pordage, Samuel (bap. 1633, d. c. 1691)

Date: 1689

And yet there is, there is one prize / Lock'd in an adamantine Breast; / Storm that then, Love, if thou be'st wise, / A Conquest above all the rest, / Her Heart, who binds all Hearts in chains, / Castanna's Heart untouch'd remains."

— Cotton, Charles (1630-1687)

Date: 1748

"the Persian Bands / In fearful Wonder ask; What God unseen / Such Pow'r bestow'd, and steel'd a Woman's Heart"

— Warton, Thomas, the elder (1688-1745)

Date: 1748

"These be now my Cares, / To leave the Muse for Virtue [...] but chief my Soul to steel / With adamantine Honour"

— Warton, Thomas, the elder (1688-1745)