RECTANGULAR RING In blackened silver, set with an oval ruby set with 8/8-cut diamonds and calibrated rubies. A diamond, ruby and silver ring. Certificate from The Gem & Pearl Laboratory: natural ruby, no heat. Provenance: Wooley & Wallis sale, 18/04/2013. RC: Dimensions of ruby: 6-7 x 5-6 x 3 mm approx. TDD: 54 1/2; US: 7 1/2 (subject to change). Gross weight: 4.5 g (Agt - 925).