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The free element, produced by reductive smelting, is a hard, lustrous, somewhat brittle, gray metal. Cobalt-based blue pigments (cobalt blue) have been used since antiquity for jewelry and paints, and to impart a distinctive blue tint to glass.
The compounds cobalt silicate and cobalt(II) aluminate (CoAl 2 O 4, cobalt blue) give a distinctive deep blue color to glass, ceramics, inks, paints and varnishes. Cobalt occurs naturally as only one stable isotope, cobalt-59. Cobalt-60 is a commercially important radioisotope, used as a radioactive tracer and for the production of high-energy ...
Art jewelry is one of the names given to jewelry created by studio craftspeople in recent decades. As the name suggests, art jewelry emphasizes creative expression and design, and is characterized by the use of a variety of materials, often commonplace or of low economic value. In this sense, it forms a counterbalance to the use of "precious ...
The first elemental metal with a clearly identifiable discoverer is cobalt, discovered in 1735 by Georg Brandt, by which time the Scientific Revolution was in full swing. [6] (Even then, cobalt might have been prepared before the 13th century by alchemists roasting and reducing its ore, but,in any case, its distinct nature was not recognised.) [7]
Stellite alloys are a family of completely non-magnetic and corrosion-resistant cobalt alloys of various compositions that have been optimised for different uses. Stellite alloys are suited for cutting tools, an example is Stellite 100, because this alloy is quite hard, maintains a good cutting edge at high temperature, and resists hardening and annealing.
The origins of this saturated shade can be traced to lapis lazuli, a gemstone that has been used in art and jewelry since 7500 B.C. A brilliant blue stone accented by white or golden flecks, lapis ...
Yellows. Sun meets sky when yellow and cobalt come together within a cheery palette. “Cobalt is a neutral in the world, so I think it complements practically every color,” says designer David ...
Cobalt-chrome disc with dental bridges and crowns manufactured using WorkNC Dental Cobalt-chrome or cobalt-chromium ( CoCr ) is a metal alloy of cobalt and chromium . Cobalt-chrome has a very high specific strength and is commonly used in gas turbines , dental implants , and orthopedic implants .
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