Frank J. Wilstach, comp. A Dictionary of Similes. 1916.

Durable

More durable than steel.
—Anonymous

Durable as yonder spheres.
—William Cowper

Durable as eternity.
—Nathaniel Hawthorne

Durable as bronze.
—Henry James

Durable as manhood.
—Alphonse M. L. Lamartine

Durable as the firmament.
—William Mathews