Ion plated Tungsten in rose, yellow, white, black, blue or brown is more difficult to scratch than traditional gold and silver. Plating can be damaged through contact with an abrasive surface or substance, chemicals, and hard surfaces (metal, wood, tile, etc). Plating can also be damaged by frequent exposure to hard water, or repeated contact with moderately hard surfaces.
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.