A lovely 18ct75% pure gold (or 750 parts pure gold and 250 parts other metals) gold ring with a platinumDerives from the Spanish word 'platina' meaning 'little silver'. Acknowledged since the 1900s, platinum's durability and natural brightness has been and still is today highly treasured A metallic element prized for its rarity, whiteness, high tensile strength and insusceptibility to corrosion, platinum first became widely used in jewellery in the late ninete... More top that was made circa 1900-1910. It has been set with three well matched white diamonds in a diagonal design, with smaller graded diamonds on either side and down in to the shouldersThe point on a ring where the central section meets the shank or band, often carved, decorated or inlaid with small diamond accent stones.. There is further decoration in the form of millgrainA technique developed in the late 19th century as a textural effect to metal work on the edges or bezels of jewellery. That technique is referred to as millegrain (or mille grain or even milegrain). From the French word mille for a thousand, and from grain as the same meaning in English, it refers to what appears to be thousands of tiny beads upon a metal pr... More. Millgrain decoration is the form of tiny bead shapes that are raised on the edges using a knurling tool and which add intricate detail. It would make an unusual engagement ring.