Diamond

Splashery stretches a drumhead over this Splash's outline, twelve inches across, and finds the ways it can ring. Its lowest is 398.9 Hz, 30 cents sharp of G4. 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 it in the light and flash its fire.

A diamond is pure carbon, squeezed into a crystal deep underground by great heat and pressure, and carried up to the surface by volcanic eruptions long ago. It is the hardest natural material. This one has a brilliant cut, with dozens of small flat faces, called facets, to catch the light.

Tap it and it turns one way and the other, the way you would tilt a ring: facet after facet flashes with rainbow sparks. Jewelers call these colors fire. They come from the stone splitting white light into its colors, as a prism does.

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