天然矿物知多少? 据前不久美国弗吉尼亚大学米歇尔教授的统计,1800年前,人类在自然界共发现不到100种矿物。1800年后,每隔20年左右新发现的矿物数量增加情况如下:1800年至1819年,增加了87种;1820年至1919年,每隔21年平均增加185种;1920年至1939年,增加了256种; According to the statistics of Professor Michelle of the University of Virginia not long ago, less than 100 kinds of minerals were found in nature by 1800. The increase in the number of newly discovered minerals every 20 years after 1800 is as follows: an increase of 87 species from 1800 to 1819; an increase of 185 species over 21 years from 1820 to 1919; an increase of 185 species from 1920 to 1939, An increase of 256 species;