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落葉風(fēng)塵金蟲 (知名作家)
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[求助]
求幫助,大神們幫忙翻譯下
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The green variety of grossular, named tsavorite after its discovery near the Tsavo National Park, is colored by a trace of vanadium. Most of this material is found in “bombs,” crystals frozen in the host rock, with the transparent rough found in the cores. The color of tsavorite ranges from pale to intense dark green. Also occurring here is grossular in other colors, ranging from colorless and pale green to yellow, orange, and brown. Tanzania (table 4) is truly a treasure chest with respect to the sheer number of beautiful gemstones that the country produces. First notable for its tanzanites in the late 1960s, Tanzania next produced tsavorites, then Umba Valley sapphires, all in the northern part of the country. Most recently, the alluvial gem gravels of the Songea and Tunduru regions in the south have been productive. |
銅蟲 (小有名氣)
| 鈣鋁榴石綠色品種——沙弗來石的顏色是微量礬的顏色,是在察沃國家公園發(fā)現(xiàn)此種礦石之后命名的。大多數(shù)的此類礦石都是在“彈坑”中發(fā)現(xiàn)的,晶體結(jié)晶在寄生巖石中,而透明的雜質(zhì)基本上都在內(nèi)核里面。沙弗來石的顏色從灰白色到深墨綠色。在這種彈孔中也有鈣鋁榴石的其他顏色,包括無色、灰綠色、黃色、橙色和棕色等。坦桑尼亞(表4)是一個真正的珠寶庫,他出產(chǎn)了非常多的漂亮寶石。1960年后期的坦桑石,后期的沙弗來石,翁巴谷藍寶石等,這些寶石都出自坦桑尼亞的北部。最近,在南部的松蓋阿和通杜魯也發(fā)現(xiàn)了沖擊寶石的礫石。 |
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