Art Deco 2.81ct Diamond and Sapphire Halo Ring, c.1930s
1870s – 1940s. This is the transition between the old European and the modern brilliant cuts. The angles of these stones are more similar to the modern brilliant to other antique cuts. For example, the table facet size is increased, and culets are nearly nonexistent or ‘somewhat large’ but could not be described as ‘large’ or ‘open’.
A method of setting whereby stones are set and secured between two ‘channels’ of metal side by side in a row.
Calibrated gemstones are mass-produced and come in certain ‘calibrated sizes’, for standard mass produced gemstone settings. If a gemstone does not fit a standard mount, one will need to be custom made.
A blue gemstone and variety of the mineral corundum. A sacred gemstone; Moses was supposedly given the Ten Commandments on a tablet of blue sapphire. Sapphire has since been known as a gemstone that symbolizes wisdom and truthfulness. Sapphires from Kashmir are said to have unrivalled beauty, being a deep cobalt blue colour with a silky look. More recently sapphires have become more popular as an engagement stone following the engagement of Katherine Middleton to Prince William. Kate wears a 12 carat Ceylon sapphire as her engagement ring which was previously owned by Diana Princess of Wales. Read more
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.
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’.
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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