A crystal with a history: the growth front only advances on a detected transient, so the structure is a record of every beat since the mount. Six-fold habit, and finer arms may only nucleate where coarser ones already have material.
Drawn with: a WebGL2 shader.
Reacts to and looks like: gpu, webgl2 and crystal.
Family: Visualiser.
Runs in your browser. The preview above is the same program the renderer uses.