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  2. Sapphire - Wikipedia

    en.wikipedia.org/wiki/Sapphire

    Main sapphire-producing countries. Sapphire is a precious gemstone, a variety of the mineral corundum, consisting of aluminium oxide (α-Al 2 O 3) with trace amounts of elements such as iron, titanium, cobalt, lead, chromium, vanadium, magnesium, boron, and silicon.

  3. Category:Sapphire mines by country - Wikipedia

    en.wikipedia.org/wiki/Category:Sapphire_mines_by...

    Sapphire mines in Madagascar (5 P) This page was last edited on 1 August 2020, at 07:38 (UTC). Text is available under the Creative Commons Attribution ...

  4. List of sapphires by size - Wikipedia

    en.wikipedia.org/wiki/List_of_sapphires_by_size

    Ruspoli Sapphire: 136.9 carats (27.38 g) [11] Stuart Sapphire: Sri Lanka 104 carats (20.8 g) Blue Tower of London [12] Bismarck Sapphire: Myanmar: 98.56 carats (19.712 g) Table Blue National Museum of Natural History, Washington [13] James J. Hill Sapphire: 22.66 carats (4.532 g) Cornflower National Museum of Natural History, Washington [14]

  5. Lists of countries by mineral production - Wikipedia

    en.wikipedia.org/wiki/Lists_of_countries_by...

    List of countries by bauxite production: Bismuth [8] China Vietnam: List of countries by bismuth production: Copper [9] Chile Peru: List of countries by copper production: Chromium [10] South Africa Turkey: List of countries by chromium production: Gold [11] China Australia: List of countries by gold production: Iron ore [12] Australia China

  6. Category:Lists of countries by mineral production - Wikipedia

    en.wikipedia.org/wiki/Category:Lists_of...

    Pages in category "Lists of countries by mineral production" The following 27 pages are in this category, out of 27 total. This list may not reflect recent changes .

  7. List of mining areas in Colombia - Wikipedia

    en.wikipedia.org/wiki/List_of_mining_areas_in...

    This is a list of mining areas in Colombia. [1] The mineral industry of Colombia is large and diverse; the country occupies the first place in mining areas per surface area in the world. In pre-Columbian times, mining of gold, silver, copper, emeralds, salt, coal and other minerals was already widespread.

  8. Ruby - Wikipedia

    en.wikipedia.org/wiki/Ruby

    Main ruby producing countries. Ruby is a pinkish red to blood-red colored gemstone, a variety of the mineral corundum (aluminium oxide). Ruby is one of the most popular traditional jewelry gems and is very durable. Other varieties of gem-quality corundum are called sapphires.

  9. Category:Lists of countries by production - Wikipedia

    en.wikipedia.org/wiki/Category:Lists_of...

    List of countries by cement production; List of countries by cereal production; List of countries by cherry production; List of countries by coconut production; List of countries by coffee production; List of countries by copper smelter production; List of countries by corn production; List of countries by food self-sufficiency rate