Grow natural red monoclinic crystals without using any dye. The chemical used for the crystals is potassium ferricyanide (K3Fe(CN)6) or ‘Red Prussiate of Potash’. It has the C-N group, which is the cyanide, but it’s bound in the crystal and won’t hurt you. Materials 93 g potassium ferricyanide200 ml warm […]
