Vintage 20.50ct Synthetic Spinel and Diamond Cocktail Ring, c.1940s
18 Carat White Gold & Platinum
Round Brilliant Cut
The standard modern round cut diamond, first invented in 1919. The stone has either 57 or 58 facets depending on whether it has a culet or not.
Gold that is silver in colour. The colour is created from yellow gold being alloyed with another silver coloured metal such as palladium or rhodium.
Used in reference to a gemstone when it has been made by chemical synthesis to imitate a natural substance (such as diamond). Unlike a simulant a synthetic gemstone has essentially the same chemical physical and optic properties as the natural. The value of synthetic stones is much lower than natural stones.
A metal prized for its rarity, whiteness, high tensile strength and insusceptibility to corrosion. It first became widely used in jewellery in the late nineteenth century, when methods were found to make it more easily workable. It features heavily in the delicate Edwardian jewellery of the first decades of the twentieth century.
A term used to describe the severity of the internal and external inclusions in a gemstone. See The Four C’s for further information.
Derived from the Greek meaning ‘unbreakable’, diamond is a mineral, considered to be the most beautiful and rare of all gemstones. Diamond has been associated with love for centuries.
Named so from the Greek ‘green stone’, emerald is coloured by the trace elements chromium or, less often, vanadium. Emeralds have been mined in Egypt since the 4th century BC. Emerald is a stone that is said to open the heart chakra and symbolize ‘successful love’. It is green variety of the Beryl family, a species that also includes aquamarine, morganite and red beryl. The most desirable emeralds are mined in Muzo, Colombia, though emeralds are also being mined in other areas of South America, Central and Eastern Africa, Madagascar, Pakistan, Afghanistan and Central Asia. Read more
The word spinel is derived from the Italian ‘spinello’ meaning ‘joint’ or ‘spina’ meaning ‘thorn’. This it thought to be a reference to the rough shape of the stone – which in its perfect form is a sharp-edged octahedron. The gemstone is sometimes known as ‘Balas Ruby’ and is frequently confused with the gemstone ruby. Spinel is 7.5-8 on the Mohs scale. Read more
The diamond colour grading scale ranges from D to Z. See The Four C’s for more information.
A weight measurement of a gemstone or gold. The term is derived from the ancient used of carob seeds to balance scales when selling amounts of gold or gemstones. The term is often shortened to ‘ct’.
A chemical element with the symbol Au. Gold is a yellow, malleable metal which makes it perfect for use in jewellery making.
One of the most defining characteristics of a diamond is its cut. While high grades of color, clarity, and carat weight affect a diamond, it's the cut that determines the symmetry of the stone's facets, its overall proportions, and its ability to reflect light. An expertly cut diamond will achieve high levels of brilliance, sparkle, and durability. For more information and cut types, see The Four C's.
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