A spectacular large and very striking 18ct75% pure gold (or 750 parts pure gold and 250 parts other metals) More gold ring that was made circa 1880. It is a marquiseA soft oval gemstone shape with a stretched point at each end, although there can be a wide variety of proportions from almost ‘spiky’ thin marquises to ‘fat’ rounder shapes. Also known as 'navette'. More shape and has been set with over two caratsThe unit of weight for a diamond or other gemstone and also for a pearl. Abbreviated 'ct', 1 carat is equal to 0.2 grams. In reference to gold, a unit of purity or fineness of gold and gold alloy, expressed as a number out of 24 parts by weight, e.g. '24 carat' signifies pure gold, '18 carat' 18/24th gold in the alloy, et cetera. Also abbreviated as 'c... More of well matched graded old mine cutAn 18th, 19th and early 20th century diamond shape, typically cushion or asymmetrical, marked by a small table, a high crown and a large culet. Culets are the small flat facets at the bottom of a stone which appear to the untrained eye as a hole in the middle of the stone. Before the advent of modern machinery which allows for the precise faceting we see tod... More diamonds with four very small rose diamondA precious, lustrous gemstone made of highly compressed carbon. Diamonds are one of the hardest materials known to mankind. Colours of diamonds range from colourless, yellow, orange and brown to almost black. Natural coloured (or ‘fancy’) diamonds can be extremely rare. The cut, colour, clarity and carat weight of a diamond are the criteria jewellers use... More pointsA unit of weight for a diamond, being one-hundredth of a metric carat. It is used for weights that are decimal fractions of a carat, and all figures after the second decimal point are, in the diamond and jewellery trade, generally discarded. More tucked around the centre diamond. The shouldersThe point on a ring where the central section meets the shank or band, often carved, decorated or}