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| Color | Process |
| Classic Processes (Inorganic) | Green | Immersion in an aqueous solution of chromic acid and ammonium chloride. Then burn at temperatures of 150˚C - 300˚C. |
| Red | Immersion in an aqueous solution of nitric acid, perchlorate, and iron scrap. Then burn at temperatures of 150˚C - 240˚C. | |
| Blue | Immersion in an aqueous solution containing potassium ferricyanide. Then immersion in a boiling sulfuric acid bath. | |
| Black | Immersion in heated sugar syrup. Then immersion on a commercial boiling sulfuric acid bath. Last, burn at temperatures between 150˚C and 200˚C. | |
| Aniline Dyeing (Organic) | Green | Immersion in an alcoholic solution of Brilliant Green dye. |
| Red | Immersion of agate in an alcoholic solution of a mixture of Rhodamine B and Basic Orange dyes. | |
| Pink | Immersion of agates in an alcoholic solution of the Rhodamine B dye. | |
| Purple | Immersion of agates in an alcoholic solution of Crystal Violet dye. |