• ColtanWikipedia

    Coltan (short for columbitetantalite and known industrially as tantalite) is a dull black metallic ore from which the elements niobium and tantalum are extracted.

    Live Chat
  • GalenaWikipedia

    Galena is the main ore of lead, used since ancient times. Because of its somewhat low melting point, it was easy to liberate by smelting. In some deposits galena

    Live Chat
  • web.mit.edu

    . .,mn 0 01 05_1 1 10 100 10th 11 11_d0003 12 13 14 141a 143b 15 16 17 17igp 18 19 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915

    Live Chat
  • Fine Collector Mineral SpecimensAndy

    Website Specializing in High Quality Mineral Specimens for Collectors

    Live Chat
  • Full text of "NEW"Internet Archive

    Search the history of over 304 billion web pages on the Internet.

    Live Chat
  • Malachite: Uses and properties of the

    Malachite is a green copper mineral used as a gemstone, sculptural material, and pigment for millenia. It is a minor ore of copper but is more valuable today for

    Live Chat
  • Mineral Species Quick Reference Guide

    John BettsFine Minerals, New York, NY Dealers of Fine Minerals and Natural Crystal Clusters since 1989. Mineral Species Quick Reference Guide

    Live Chat
  • Our Service

    What you need is what we can do! In the future, Xinhai will continue to rely on three big supporting "technology, talents, management", adhere to the international development strategy, and concentrate on providing customers with modern, efficient, energy-saving mine overall construction and operational solution, to create international leading enterprises in mining industry.