Rock Candy is made by a process of crystallization, the same process that produces quartz and diamonds in nature – with a different ingredient, of course.  It is made by breaking apart the sugar (sucrose) molecular crystal lattice and then allowing it to re-form in conditions that produce larger, purer crystals. A hot, saturated solution of cane sugar and water is poured into large tanks. Careful supervision of the cooling process produces the larger crystals, which are then harvested as Rock Candy sticks, strings, or loose crystals.