Dumortierite is a mineral called boro-silicate. In addition to its use in jewelry making and as a mineral specimen, it is used in the manufacture of high grade ceramics and porcelain.
It is named for the French paleontologist, Eugene Dumortier, who discovered it
It is opaque, translucent, and transparent indigo blue to violet, but also pink and brown. It may be fluorescent under black light. It is easy to see why it is often erroneously identified as blue denim lapis lazuli or sodalite.
|common treatments: none|
|special care: normal jewelry care (avoid abrasion, impact, and harsh chemicals)|