THE MATERIAL LIBRARY
Topaz
A silicate gemstone with a bright polish and distinct cleavage.
Colors & patterns
Colorless, blue, yellow, orange, pink and other tones.
Typical origins
Brazil is a major source; other sources include Pakistan and Russia.
Hardness
8 on the Mohs scale.
Choosing & setting this material
Despite its hardness, topaz can split if struck. Most commercial blue topaz is treated; a protective setting and gentle handling are important.
Care & cleaning
Clean gently with lukewarm water, a little mild soap and a soft cloth, then dry. Avoid steam, ultrasonic cleaners, harsh chemicals and sudden temperature changes, especially when treatments are unknown.
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