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Common name used for blue stones prior to the 1800s when chemical compound names were standardized (Schur 1985). It was applied to Azurite, Lazurite, Lapis lazuli, and Turquoise.
Resources and Citations
- Susan E. Schur, Conservation Terminology: A review of Past & Current Nomenclature of Materials, Technology and Conservation, Spring (p.34-39); Summer (p.35-38); Fall (p.25-36), 1985