![]() It is of no commercial significance, because of its rarity. It is translucent, apple to emerald green in color and some has been cut as a gem stone because of its historic interest. See BOLEY GAUGE, GROSSMAN GAUGE, VERNIER, JEWELING CALIPER ATTACHMENT, DIAL GAUGE.Ĭallainite – (kal’lane-ite) A mineral, related to turquoise found in a Celtic grave in Brittany. English term demoting the design or type of a watch or clock movement, or of the gear train of a timepiece. A tool for holding watch balances while truing them. ![]() Usually a measuring tool with adjustable jaws that embrace the object being measured. True lapis luzuli has been reported from California.Ĭalifornia moonstone – Chalcedony pebbles.Ĭalifornia onyx – Dark brown banded calcium carbonate, aragonite.Ĭalifornite – A compact variety of green vesuvianite which can be cut and polished much like jade, which it strongly resembles.Ĭaliper – 1. Size and factory number of a given watch movement.Ĭalifornia iris – Fanciful term for kunzite variety of spodumene.Ĭalifornia jade – Misnomer for californite.Ĭalifornia lapis – Usually a misnomers for a mixture of blue dumortierite and quartz. Also sometimes used in the trade to designate small colored stones of “fancy” shapes. Small colored stones in rectangular or square shapes used adjunctively in the decoration of a piece of jewelry, rather than as the central motif, or set in band in guard ring. More complicated mechanisms show month adjust for month lengths and lead years show phases of moon, positions of stars, times of sunrise and sunset each day, difference between solar and mean time, and tidal changes.Ĭalf’s head cut – A fancy diamond shape, a tapering baguette with the wide corners truncated.Ĭalibrate – To adjust a measuring instrument by comparison with an accurate standard.Ĭalibrated – Stones, usually colored, cut to precise dimensions for mounting in machine-made setting.Ĭalibre – (kal’i-bray) 1. See BISSEXTILE.Ĭalendar watch – A watch that shows the date, day of week or longer intervals. Mexico onyx, Mexican jade, Atlas pearls, calcite prism pearls and cerulene are other name often applied to calcite.Ĭalomalachite – (kal’ko-mal”a-kite) Mixture or malachite, calcite and gypsum, sometimes said to be used as a decorative stone.Ĭalendar mechanism – Wheels, leaver, and plates to indicate day and dates in a time piece.Ĭalendar, perpetual – Timepiece calendars which provide for unequal months as well as the 29th of February during leap years. Some varieties, often colored by natural or artificial impurities, are used as a decorative material. It has a strong birefringence, and clear crystals, known as Iceland spar, are used in the polarizing microscope and the dichroscope. In Europe, calamine is the name applied to the carbonate of zinc, here called smithsonite, and sometimes used as a gem despite its softness.Ĭalcite – (kal’site) A common mineral, calcium carbonate, and the principal constituent of limestone and marble. In the United States of America calamine is synonymous with hemimorphite and is a silicate of zinc, an ore of zinc but not a gem mineral. It is a popular Scottish stone and was named for the locality, a mountain, in the streams of which waterworm crystals are found.Ĭalamine – (kal’a-meen) A name about which much confusion has arisen. ![]() A stone of a smoky gray or brownish color, not to be confused with the yellow citrine. Unimportant as a gem.Ĭadmium – An elemental metal used as an alloy in gold solders to promote easy flowing under heat.Ĭadrature – Striking word under the dial but often used to refer to striking work on outside back of clock movement.Ĭairngorm – (kairn’gorm) Smoky quartz. Poor-quality specimens of many stones that are usually faceted are often cut in this shape.Ĭacholong – (kash’o-long) Or cachalog, an opaque bluish-white or porcelain-white variety of common opal. Stones that contain needle-like, parallel inclusions as a single set or on three 60°- intersecting sets are cut in a high cabochon to bring out the eye or star moon-stones and opals are best cut low. See CLARITY GRADE.Ĭable – String or cord of twisted rope, metal or gut connecting power source to the train of wheels in a timepiece.Ĭable fluting – Round moulding worked in the flutes of a column.Ĭable girdling – Rope-type decoration circling a silver piece.Ĭabochon – An unfaceted form of cutting, used for opaque and translucent stones the stone is given a rounded, convex shape, and cut high or low for best effect. C – Abbreviation for “clean to the unaided eye”. ![]()
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