Sapphire is commonly subjected to enhancement processes or treatments such as heating and diffusion. Gently clean by rinsing in warm water and drying with a soft cloth.
The amethysts pictured may have been treated or enhanced by heating.
The garnets pictured may have been treated or enhanced by heating.
The natural color gemstones featured here may have been subject to an enhancement process or treatment (e.g. heating, oiling, diffusion, waxing, etc.). This treatment may not be permanent and may require special care and should be cleaned by rinsing in warm water and drying with a soft cloth.
Tourmaline is commonly subject to heating and irradiation and enhancement processes using wax, oil or resin, which may not be permanent and may require special care. Gently clean by rinsing in warm water and drying with a soft cloth. Avoid temperature changes, chemicals, steaming and ultrasonic cleaning.