OSTERTAG | RUBY AND DIAMOND BROOCH
8,000 - 12,000 GBP
RUBY AND DIAMOND BROOCH
Of geometric design, collet-set with cabochon rubies, baguette and circular-cut diamonds, signed Ostertag, French assay mark and partial maker's mark; 1930s.
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French assay mark for platinum. Signed Ostertag France. Partial maker's mark SD with indistinct symbol . Rubies with some surface reaching fissures, abrasions consistent with wear. Estimated total diamond weight approximately 9.00-12.00 carats, estimated colour H-J, estimated clarity VS-SI on average, some stones I-clarity. Secure clasp. Scratches to metal consistent with wear. In good condition. Overall dimensions approximately 67 x 31mm gross weight approximately 32 grams.
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