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符合的藏品
共找到 26 筆符合的資料
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中文名:寶石礦物的具備條件
(Durability)—寶石的硬度愈大,愈不易受到硬物刮傷,所以寶石的硬度通常在摩氏硬度6以上,珍貴寶石的硬度更是在7以上。而且寶石的化學和物理性質需穩定,才不易受酸鹼的腐蝕,解理不能發達,也沒有裂紋.....more
- 2/26
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中文名:放射纖維磷鋁石
均呈白色。具有二組完全解理,也易溶於酸中,為其重要特徵。 放射纖維磷鋁石是一種少見的次生礦物,主要產在低度變質的鋁質岩石裂縫內,或是褐鐵礦或磷酸鹽的礦床中,在地表相當穩定。" 化學性質:溶於酸 晶.....more
- 11/26
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