THE MATERIAL LIBRARY
Pearl
An organic gem formed in a mollusk; most jewelry pearls are cultured.
Colors & patterns
White, cream, pink, gold, gray and darker colors with lustrous overtones.
Typical origins
Freshwater cultured pearls are strongly associated with China; saltwater production includes Japan, Australia and French Polynesia.
Hardness
About 2.5–3
Choosing & setting this material
A flat-backed pearl or assembled blister pearl can be set like a cab. Confirm its construction, cultivation type and any dyeing or other treatment.
Care & cleaning
Wipe gently with a soft, slightly damp cloth and dry promptly. Avoid soaking, acids, solvents, steam and ultrasonic cleaning. Store separately to protect the surface.
Origins above describe typical sources of the material, not the origin of an illustrated or stocked stone. Hardness measures scratch resistance, not resistance to breaking. Confirm the identity and treatments of the actual piece.
Further reading: Material reference · GIA: gem treatments