41. Most of the ore mined had a low iron content and required substantial refining or beneficiation before use in blast furnaces. 42. It can also bring on anemia, which might explain the evidence of low iron content in some of the mummy's muscles. 43. One of the advantages of magnetite concentrate is its high iron content and low impurities compared to traditional iron ore products. 44. The main feature of this sapphire is the dark blue or close to black color because of the high iron content . 45. Natural ores have an iron content of 51 to 57 per cent while the pellets contain 60 to 67 per cent. 46. Because the water's high natural iron content might otherwise foul the plumbing, chelating agents were added to keep the iron in solution. 47. Local attractions include the " fuente agua agria " water with a high iron content which is purported to have medicinal properties. 48. Iron content in and around Crystal Lake was enough to attract interest in iron mining; references to mining date back to 1778.49. As in the Pennsylvania diabase ringing rocks, this point suggests that iron content is not a primary factor in the ringing ability. 50. Its waters were one of very few throughout Europe to have been classified as a medicine due to their high iron content .
