Alum Crystal

Splashery stretches a drumhead over this Splash's outline, twelve inches across, and finds the ways it can ring. Its lowest is 551.2 Hz, 90 cents sharp of C5, the nearest tine on the comb. The next fifteen are its overtones, and each one draws its own figure: sand gathers on the lines that stay still.

Tap it to turn the crystal on its block; drag to turn it yourself.

A pink block of alum, captured from photos and drawn with splats. Alum is a mineral salt that people have used for centuries to clear muddy water, to fix dye in cloth and, as a crystal stick, to stop small shaving nicks from bleeding.

Tap it and the crystal is turned a quarter of the way round on its block. Drag around it to see the frosted, uneven faces and the dark stand it sits on.

This link opens it in the Playground. To put it on your own page, add the element and one script tag. Every option.