Treatment:The term “treatment” refers to any process that alters the natural state of a gemstone. Common treatments include heating, irradiation, and dyeing. Heating is perhaps the most common treatment, as it can enhance the color of a gemstone or even change its color entirely. Irradiation can also be used to alter the color of a gemstone, but it is less common due to the potential risks involved. Dyeing is another common treatment that is used to enhance the color of a gemstone, but it should be noted that dyed gemstones are not as valuable as those that occur naturally in their desired color.