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$1,760
本組共含15個標本
用來說明結晶的形態及如何聚成礦石，結晶形態包刮樹枝狀、纖維狀、雲母、帶狀及輻射狀等
Contains 15 specimens, approximately 1 1/2" x 1 1/2" showing different crystal habits and aggregation of minerals such as dendritic, fibrous, micaceous, banding, and radiated.
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