| 回首頁 | ENGLISH | 兒童館 | CHILDREN | MyMuseum
| 進階檢索
現在位置:自然與人文數位博物館 » 一般大眾 » 數位學習資源 » 礦物之美
:::

寶石礦床的種類
* 圖說:
				瑪瑙
* 圖說: 瑪瑙
Placer deposits
Placer deposits are valuable minerals that have been weathered and broken down into sand gravel, and accumulate on river banks or beaches due to their higher specific gravity content. These deposits ..........
.... more
Hydrothermal deposits

Hydrothermal deposits are mineral deposits formed from solutions containing volatile and metallic elements heated by late stage magmatic activities. Changes in external environment result in the ..........

.... more
Secondary deposits
Secondary minerals are formed from the precipitation of primary minerals, dissolved by groundwater, at near-room temperature close to the surface. Gemstones formed as secondary deposits include ..........
.... more
 
 
 
 
推薦關鍵字
延伸閱讀
   
數位典藏國家型科技計畫/國立自然科學博物館 版權所有
Copyright National Digital Archives Program. / National Museum of Natural Science. All rights Reserved.
瀏覽人次:14429570

|  關於我們|  最新消息|  網站地圖|  科博館