ML303 Danburite

  賽黃晶Name   Danburite
化學公式   CaB2(SiO4)2Chemical Formula   CaB2(SiO4)2
莫氏硬度   7-7.5Mohs scale of Hardness   7-7.5
描述 賽黃晶是一種鈣硼矽酸鹽礦物,形成小棱柱狀晶體,類似於黃玉。它的顏色可以從白色到淺黃色,也可以是淺棕色。非常優質的丹布里石是無色的,通常是透明的。有時甚至可以發現它上面有一層無光澤的石英塗層。由於寶石的清晰度和彈性,珠寶商喜歡切割這種材料。  Description   Danburite is a calcium boron silicate mineral that forms in small prismatic crystals, similar to Topaz. Its color can range from a white to light yellow, and also a light shade of brown. Very high quality Danburite is colorless and usually transparent. Sometimes it can even be found with a druzy coating of Quartz over it. Jewelers love cutting this material due to the gems clarity and resilience. 
小挑戰   它的起源 這種礦物於 1839 年由查爾斯·謝潑德 (Charles Shepard) 首次發現,並以其在康涅狄格州丹伯里 (Danbury) 發現的地點命名。這個地方從未被正式記錄過,並且隨著時間的流逝而消失了。據推測,丹伯里的實際城市就建在傳聞所在位置的頂部。從那時起,在俄羅斯、墨西哥、玻利維亞、緬甸、日本和馬達加斯加都發現了丹布里石。最近在紐約馬科姆鎮發現的丹伯利特重新點燃了人們對美國無休止的丹伯利特蒐索的興趣。  Challenge   What is its origin? This mineral was first discovered in 1839 by Charles Shepard, and named after the location it was found in, Danbury, Connecticut. This locality was never officially documented and became lost in time. It’s presumed that the actual city of Danbury was built right on top of the location where it was rumored to be. Since then, Danburite has been found in Russia, Mexico, Bolivia, Myanmar, Japan and Madagascar. A recent Danburite discovery in the town of Macomb, New York has reignited the interest in America’s endless Danburite search.