Adularescence: a blue that is Rayleigh scattering off exsolution layers a few hundred nanometres thick, floating below the surface and sliding as the stone turns, with the light that gets through coming out warm.
Drawn with: a WebGL2 shader.
Reacts to and looks like: gpu, webgl2 and audio-reactive.
Family: Visualiser.
Runs in your browser. The preview above is the same program the renderer uses.