Details: ±0,40ct Sapphire, ±0,40ct (H-I SI1) Old Mine Cut Diamonds, 18ct, Platinum Ring.
Dispatches from a small business in Amsterdam, The Netherlands.
Design Era: Edwardian (1901-1915).
Size: 17.12 NL / 53.8 FR / 6¾ US / N UK, sizeable (Within reason. Contact seller for information).
Dimensions: H 0.5 x L 0.9 x W 0.9 cm.
Weight in grams: 2,5.
Condition: Very good condition – slightly used with small signs of wear.
The Edwardian period (1901-1915) began with the death of Queen Victoria, when her son Edward became King. During this period, many of the Edwardian-designed pieces incorporated more expensive gems such as diamonds, emeralds, and rubies in elaborate designs.
The most popular form of sapphire is blue sapphire, which is known for its medium to deep blue colour and strong saturation. Fancy sapphires of various colours are also available. In the United States, blue sapphire tends to be the most popular and most affordable of the three major precious gemstones (emerald, ruby, and sapphire).
Old Mine Cut Diamond
Diamonds with this cut possess a squarish girdle with gently rounded corners. Old mine cut diamonds have a high crown, a small table, and a large, flat culet. They are similar to today's cushion cut. The old mine cut dates to the 1700s and was most prevalent during the Georgian and Victorian eras.
Because of the softness of pure (24k), it is usually alloyed with base metals for use in jewelry, altering its hardness and ductility, melting point, color and other properties. Alloys with lower carat rating, typically 22k, 18k, 14k or 9k, contain higher percentages of copper or other base metals or silver or palladium in the alloy. Copper is the most commonly used base metal, yielding a redder color.
The element platinum derives its name from the Spanish Platina del Pinto which translates to 'little silver from the Pinto' (said to be a river near Popayan, Columbia in which alluvial platinum was first found by the Spanish Conquistadors). Its white metallic luster leaves little doubt as to why the Spanish chose the name.
Platinum belongs to a group of elements, fittingly called the platinum group of metals. Apart from platinum the group comprises Osmium, Iridium, Palladium, Rhodium and Ruthenium. Platinum is often found as natural alloys containing one or more of these other elements and it wasn't until 1804 that all but one of the elements were isolated and named.
Platinum is malleable, ductile and very strong. In addition, it does not tarnish and it doesn't corrode making it a highly prized metal and extremely suitable for the manufacture of fine jewelry.