design-is-fine: Ring with icicle-shaped diamond, so called...
Ring with icicle-shaped diamond, so called Matthias ring, late 16th century. Southern Germany. Museum of Applied Arts, Budapest
Engagement rings were frequently set with diamonds as a symbol of constancy, and there are a number of extant Renaissance rings with pointed pyramidal gems, but the extremely elongated form of this exquisitely finished stone makes it very rare.
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