conchoidal

Updated: April 30, 2025

Whether sapphire under the sunlight, or all but black under the clouds, or laced and streaked with beads of foam, rising out of the nether darkness, it looks as if it could resist the hand; as if one might almost walk on it; so unlike any liquid, as seen near shore or inland, is this leaping, heaving plain, reminding one, by its innumerable conchoidal curves, not of water, not even of ice, but rather of obsidian.

Charles Kingsley - At Last