美國 Scott 出品，原廠包裝。
本組共含15個標本。
都是常見的金屬礦物，每塊標本接近4公分。
The term "ore" is used in connection with a rock or mineral mass when it contains enough of an element or compound to make it economically feasible to mine.
15 specimens of the more important ores are included. Approximately 1 1/2".
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