A single stone aquamarine ring with diamond set shoulders

A single stone aquamarine ring with diamond set shoulders, A single stone aquamarine ring with diamond set shoulders, with a rectangular step cut aquamarine, four claw set to a plain collet. A brilliant cut diamond, grain set to a raised obus at each shoulder, to a plain, tapered 'D' section shank. Tested as approximately 18ct gold. Head 18.00mm x 14.20mm Finger size O LE Buying this gemstone ring at auction could save up to 0.42 tonnes of CO2e compared to buying new. Condition Report: Does not appear to have been worn. Aquamarine possibly in the region of 6.00ct.