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Results 121 - 129 of 129 for Jewellery
  • Article - 23 Jan 2002
    Platinum belongs to the platinum group of metals and it is malleable, lustrous, and ductile. It occurs abundantly on the earth’s crust, with around 0.001 ppm.
  • Article - 23 Jan 2002
    With a history much shorter than that of gold, its use and discovery in the 1700's is described. Development of the platinum market through the 1800's and into more modern times is also covered....
  • Article - 15 Jan 2002
    Zirconium is usually contaminated with hafnium due to their chemical similarity. It is resistant to most solvents and performs well in nuclear reactors, where most zirconium metal is used.
  • Article - 23 Jul 2001
    Platinum (Pt) was discovered by Ulloa in 1735 and Wood in 1741. Platinum occurs as such naturally, together with negligible amounts of palladium, iridium, rhodium, osmium, and ruthenium.
  • Article - 21 Jul 2001
    Silver metal in its pure state has a brilliant white metallic lustre and it is a little harder than gold and is very ductile and malleable. It has 3 commercial types and applications in jewellery,...
  • Article - 20 Jul 2001
    Gold is most widely known as a precious metal due to its high lustre and chemical inertness. It is also used for coinage, ornaments, jewellery, gilding, textile industry, radiation control,...
  • Article - 11 Apr 2001
    An innovative titanium casting technology developed by Taramm is outlined. It incorporates vaccum melting and pouring and uses purpose designed moulds which generates a magnetic field resulting in...
  • Article - 7 Feb 2001
    Brasses are alloys of copper and zinc (generally 5 to 40%). They are used for high pressure gas valves, gilding metals, plumbing systems and heat exchangers.
  • Article - 7 Feb 2001
    This article discusses the properties and application of nickel silvers, a copper alloy.