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Colophonite – Applied variously to a brown garnet and to a brown variety of vesuvianite from Arendal, Norway. The scintillation emphasises the colour and clarity, so you'll need a qualitative gemstone as the centrepiece. How are the various diamond shapes cut? - BAUNAT. Drop pearls – Pearl-shaped or oval pearls. Doré – (doe-ray') 1. The sawn-off top of an octahedral diamond crystal. Dispersion cannot be seen when light passes through a medium with parallel sides because the emerging ray reunite. Column wheel – The castle wheel of a chronograph with radial, ratchet teeth and perpendicular abutments used to phase the levers.

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And more: for very good, 0, 1, 2; for good, 3, 4, 5; for medium, 6, 7, 8; for poor, 9, 10. One of the best-known oval gemstones is the Pink Star, the most expensive diamond in the world, which was sold at auction for an eye-watering amount of 70 million dollars. Indeed, the final carat weight exponentially determines the value and price. In the 17th century, one of its inhabitants, Marcel Tolkowsky, made the city worthy of its name: he devised a scientific formula to be the first to cut a diamond in 58 facets, known today as the round brilliant cut. They are posts with omega clips. In the past I have authored posts on, Diamonds on Postage Stamps, Top Ten - Largest Diamonds Discovered In The World, Splendors of Mughal India, The Magnificent Maharajas Of India, Mystery & History Of Marquise Diamond Cut, Ór - Ireland's Gold, The Legendary Cullinan Diamond, Bejeweled Persia - Historic Jewelry From The Qajar Dynasty, Famous Heart-Shaped Diamonds, Type II Diamonds, Green Diamonds, Red Diamonds and more. Circular pitch – A measurement on the pinch-circle of a gear wheel or pinion; a unit of circular pitch is equal to the circumference of the circle divided by the number of teeth or leaves. Carbon steel – Steel with a comparative high carbon content used for springs and cutting tools. Ceylon sapphire – Usually taken in the trade to mean a somewhat paler blue sapphire than the Kashmir. Piece of carved jewellery. Clarity grade – The relation purity of a cut diamond; its position on a flawless to imperfect scale, determined as the American Gem Society say, "not only by the size, number and visibility of inclusions and surface marks, but also by their nature, location, and effect on the durability of the diamond. "

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Dust pearls – Small pearls less than 1/25th of a grain. A natural pink pearl found in the chank (Turdinella scolymas). Caput mortuum – Iron oxide, for polishing. First used by Carroll Chatham as an alternative for the FTC-disapproved "cultured, " as in "Chatham created emeralds, " it was taken up by other producers to combat a prejudice against "synthetic, " a term thought objectionable from its frequent misuse in description of all types of imitations, some of which were only glass. Daily rate – The day-to-day variation from precise time a watch or clock gains (+) and loses (-). Cement basses are made of various sizes for holding flat and cylindrical. Please to all, take care of yourself. Terse memo from the boss. Jewelry piece that's been cleaved or shaped crossword. The correct term for a chronograph. To help you understand your certificate better, we have started by explaining the cut quality grading of the diamond. As the cutting substantially impacts value, it is crucial to leave this to the experts. See BLUE CHALCEDONY. Or chaton foil, a foil-backed glass gem. According to the diamond trade, the pointed end must point towards the fingertips.

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Simultaneously, the table is very flat, meaning inclusions or flaws will be a little more noticeable. The ray are separated be cause they are slowed and bent according to their wavelengths, the shortest ones, violet, being bent the most and the longest, red, the least. Cabochons are often used with coloured gemstones as the technique emphasises the colour. Today we look at the most expensive jewelry in the world, from a list compiled by Lisa Dingman for luxury lifestyle blog TheRichest. As such, a slightly less valuable diamond, such as an impure yellow-coloured stone, can still scintillate despite a modified shape. Date corrector – A push lever to advance the date disk until the correct date appears. Jewelry piece that's been cleaved or shared items in google. 33 carat, bezel set Lab grown Diamond. Conchiolin – (kon-ki'o-lin) The nitrogenous organic substance in shells and pearls which cements the calcite and aragonite which are the principal ingredients. Stones, exposed culet-up to the deuteron beam, turned dark tourmaline green, red-brown, or yellow, the depth of penetration showing under magnification as an umbrella around the culet. You will see that my show schedule has changed.

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Diaper – A type of ornamentation produced by repeating a geometrical pattern in small squares. Disengaging friction – In gearing, friction between teeth after their point of contrast has passed the line of centers. Calamine – (kal'a-meen) A name about which much confusion has arisen. Ideally, a diamond on a ring should have as few flaws as possible to increase the value of the ring. Diamantine – (di'ah-man"tin) A chemically prepared crystallization of boron, used as an abrasive powder for polishing steel. 53, the specific gravity from 2. The escape-wheel of a verge escapement. Centimeter – One hundredth part of a meter or 10 millimeters. Market chain with a red oval logo crossword clue. This diamond is also popular as it has a vintage appearance, with a nod to the Art Deco style of the 1920s and 30s. Carat or weight depends on its size. Provision for making the timekeeping of balances or pendulum uniform during changes of atmosphere temperature in heat and cold. A separation parallel to an octahedron face of the original crystal, undesirable because it is a break with danger of extension.

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Classroom furniture. Archaeological site. Drill rod – Commercial name for tool steel rods in sizes from smallest up to about ¼-inch diameter, used by watchmakers for making staffs, stems, drills, taps, etc. 34 old carats), constitutes the major portion of this legendary stone and that some time after its theft from the Garde Meuble it had been recut to avoid detection. The ideal crown height in 14. Cuff link – A device consisting of a front ornament and a snap or swinging back, used to keep button-less cuffs closed. Depending on your personal taste, you can have the dome made higher, rounder or flatter. The sapphire doublet, for example, is blue glass with a natural garnet top. Choke – A short, 14-in. A cabochon is easy to combine with a range of jewellery, and can create both a designer or vintage look. Chrome tourmaline – Recently discovered chromium-bearing tourmaline found in a locality, not far from the Longido Hills, Tanzanian zoisite locality, and associated with emerald green to colorless grossular garnet. It is unfair trade practice to use the word pearl to describe a cultured pearl unless it is preceded by the word cultured or cultivated. Crucible – A container made of refractory material in which metals are melted. FAMOUS DIAMONDS - BRUNSWICK BLUE –. Clock – A timepiece used normally in stationary position, not worn on the person.

See FRICTIONAL ESCAPEMENT. There are even specialist jeweller/goldsmith courses that can be followed to truly get to grips with the trade. In the trade, carbon is used as an abbreviation of carbonado, and apparently black inclusions in diamond are called carbon spots, although, as Eric Bruton, observes, very few if any are carbon and only a few are truly black. The cut in the Leibish Prosperity Pink enables the light to remain within the facets of the stone and shows an excellent vivid purplish pink color. An aluminum oxide which rarely occurs in crystals large enough to cut white, grayish or violet gems for collectors.