Costagli Blue Zircon & Tanzanite Diamond Ring
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Paolo Costagli, zircon, tanzanite and diamond ring, the oval-shaped blue zircon, with estimated weight 12.40 carats, set between triangular-shaped tanzanites, the mounted accented with round brilliant-cut diamonds, estimated total diamond weight 0.40 carats, signed Costagli New York, mounted in 18ct gold, weight 8.3gm, ring size L.
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