A MALACHITE, AGATE, ROCK CRYSTAL AND BLACK ONYX MINIATURE TAZZA, BY OSTERTAG
THE DI PORTANOVA COLLECTION
A MALACHITE, AGATE, ROCK CRYSTAL AND BLACK ONYX MINIATURE TAZZA, BY OSTERTAG

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A MALACHITE, AGATE, ROCK CRYSTAL AND BLACK ONYX MINIATURE TAZZA, BY OSTERTAG
The rectangular malachite dish enhanced by cabochon rubies and gold fittings, on four agate supports enhanced by a rock crystal bar with gold hoop terminals, on a black onyx base, mounted in 18K gold, circa 1930, 17/8 ins., with French assay mark and maker's mark
Signed Ostertag

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