Beryl

Everything in Beryl

• Emerald Is the One Gemstone the Trade Agreed to ForgiveExamines how the GIA's grading system treats emerald inclusions — the jardin — differently from those in ruby or sapphire, and why a flawless emerald is treated with suspicion rather than admiration.
• Muzo and Chivor Were Being Worked Before the Spanish ArrivedDocuments the pre-Columbian Muisca extraction at Muzo and Chivor in Colombia's Boyacá department, tracing the mines from indigenous use through Spanish seizure to the modern concession system.
• The Beryls That Are Not EmeraldCovers aquamarine (iron-blue) and morganite (manganese-pink) as beryl varieties with their own deposit records — Brazil's Minas Gerais for aquamarine, Madagascar and California for morganite — and notes where each sits in the GIA classification.
• The Urals Were the Only European Source, and They Still AreTraces the discovery of emerald-bearing mica schist near Yekaterinburg in 1831 and the subsequent Malysheva mine operation, covering the geological conditions — chromium from serpentinite intruding into beryl-bearing pegmatite — and how Ural material compares to Colombian in the record.