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礦物之美-(銀星石-Wavellite)
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WAVELLITE Al3(PO4)2(OH,F)3·5H2O (orthorhombic) . radiating crystal spheres in novaculite rock . Magnet Cove, Hot Spring County, Arkansas . 銀星石晶體少見,多作輻射針狀的半球狀或圓球狀,綠色,黃色玻璃到珍珠光澤.硬度 3.5 - 4. 發生於變質後的鋁質岩石裂隙間.以發現者William Wavell 為名!好的標本為大部份的球狀結晶中夾雜著少數量輻射針狀的半球面,在光線下產生 sparkling pinwheel effect. 著名產地:Arkansas and Pennsylvania,
USA; Bolivia and England. |
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