David Webb Unicorn Platinum & 18K Yellow Gold Unicorn Black Enamel, Ruby, Diamonds Brooch. Circa 1965 Round brilliant-cut diamonds and pear-shaped rubies Signed Platinum and 18 karat yellow gold, measuring approximately 3.00 x 2.00 inches Center Diamond Weight: 0.00 Metal Type: Platinum & 18K Yellow Gold Metal Weight: 69.6 gr. Signed: WEBB Condition: Excellent. Stock: RR3833