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

Transparent

Transparent as a veil.
—Hans Christian Andersen

Transparent as a young sardine.
—Anonymous

Transparent as crystal.
—Anonymous

Transparent as gossamer.
—Anonymous

Transparent as light.
—Anonymous

Transparent … as a ruby smitten by the sun.
—Dante

Transparent as a rock of solid crystal.
—John Dryden

Transparent as a rock-pool.
—George Eliot

Transparent as mica.
—O. Henry

Transparent as pure water.
—Sigmund Krasinski

Transparent as glass.
—Guy de Maupassant

Transparent as air.
—Bernardin de Saint-Pierre

Transparent as barricadoes.
—William Shakespeare

Transparent as the soul of innocent youth.
—William Wordsworth