Examples 21. Cassiterite production peaked at 1, 000 tonnes in 1990, but was under 700 tonnes in 2000.22. Distinctive accessory minerals include : fluorite, topaz, apatite, spinel, allanite, sphene and cassiterite . 23. Associated minerals include cassiterite , scheelite, bismuth, quartz, pyrite, galena, sphalerite, and arsenopyrite. 24. The method by which tin is produced is to head the tin mineral cassiterite ( SnO 2 ) with coke. 25. Associated minerals include quartz, feldspar, spodumene, amblygonite, tourmaline, columbite, cassiterite , topaz and beryl. 26. Cassiterite , coltan, and gold are being extracted from these mines and brought illegally to Goma through Masisi territory.27. Cassiterite ( SnO 2 ), oxidized tin, most likely was the original source of tin in ancient times.28. There is mining of copper, iron, manganese, gold, cassiterite ( tin ore ), and phosphates. 29. Valuable mineral components often occurring with black sands are monazite, rutile, zircon, chromite, wolframite, and cassiterite . 30. It was probably gathered in streams in Cornwall and Devon as cassiterite pebbles and traded in this raw, unrefined state.
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