Rock Candy: Sugar Crystal Growth — 2D Faceted Crystallization Simulator

A supersaturated sucrose solution deposits sugar molecules onto a seed crystal's flat facets over real days, one thin layer at a time. This simplified 2D cross-section tracks that growth front directly — independent surface columns along the crystal's top and bottom faces that thicken in discrete layers as concentration, temperature and stirring set the real supersaturation-driven deposition rate, staying smooth and faceted at low supersaturation or roughening into cloudy defects when growth outruns diffusion.