| Gemstones | Treatments | Duration | Care |
| Rubies, Citrines Sapphires, and Amethysts | Heating is commonly used to enhance color and clarity. | Permanent | May be cleaned with a soft brush and mild, soapy water. Ultrasonic cleaners may be used. |
| Emeralds | Oils, wax or clear resins are sometimes used to enhance color and clarity. | 2-5 Years | Cleaning to be done by a professional jeweler only. |
| Aquamarine and Tanzanite | Heating is commonly used to enhance color and clarity. | Permanent | Clean with a soft brush and warm, soapy water. Avoid ultrasonic cleaners. |
| Blue Topaz and Tourmaline | Irradiation is commonly used to enhance color and clarity. | Permanent | Clean with a soft brush and warm, soapy water. Avoid ultrasonic cleaners. |
| Cultured Pearls | Dyeing and irradition are commonly used to enhance colors. | Permanent | Cleaning to be done by a professional jeweler only. |
| Diamonds | Not routinely treated for color or clarity. | Permanent | Clean with a soft brush and warm, soapy water or jewelry cleaning solution. Ultrasonic cleaners may be used. |
| Garnets | None | Permanent | Clean with a soft brush and warm, soapy water or jewelry cleaning solution. Ultrasonic cleaners may be used. |
| Peridots | Not routinely treated for color or clarity. | Permanent | Clean with a soft brush and warm, soapy water. Avoid ultrasonic cleaners. |
| Smoky Quartz | Heating and irradiation are commonly used to enhance colors. | Permanent | Clean with a soft brush and warm, soapy water. Ultrasonic cleaners may be used. |
