luyjluyj wrote:請問行家:這塊是什麼石頭?
luyjluyj wrote:在新竹河邊撿到一塊石...(恕刪)
luyjluyj wrote:在新竹河邊撿到一塊石...(恕刪)</blockquot換算出比重在這範圍好像沒什麼有價礦物