HARDSTONES

Online lesson: Spring 2026 Program (SESSION 4) Terminology discussion around the terms “hardstone”, “ornamental stone” and “pietre dure”. The early use as engraved gem materials (e.g. lapis lazuli, amazonite, chalcedonies), and the vast array of materials used for carvings during the Qianglong period of the Qing dynasty in China (1735-1796), including quartz varieties, lapis lazuli, turquoise, malachite and the jades.

APRIL 16, 9:00 AM or 7:00 PM (Lisbon/London timezone)

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