LOT 8937 俄羅斯天然無燒亞歷山大變色石裸石
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主石:1.12 克拉 BLUE-Green to Pink-Purple CUSHION 配鑲:?顆共約???克拉、?顆共約???克拉、18K
亞歷山德里特是礦物菊花的稀有品種,在不同的照明中改變顏色。最珍貴的是那些亞歷山大誕生石,在日光或螢光燈下呈現出鮮豔的綠色到藍綠色,在白熾燈下呈現強烈的紅色到紫色的紅色。1830年,在俄羅斯烏拉爾山脈首次發現了主要的亞歷山德里特礦床。這種具有變色效果的寶石是以年輕的亞歷山大二世的名字命名的,亞歷山大二世是王位的繼承人。它的紅色和綠色顏色變化引起了俄羅斯全國的注意,因為正反映了俄羅斯帝國的國家軍事色彩。GIA的文獻裡寫道:現在大部分亞歷山大變石來自巴西、斯里蘭卡和東非。 較新的礦床包含一些優質寶石,但與俄羅斯亞歷山大變石相比,許多寶石的顏色變化不那麼精確,色調更渾濁。 更因為市場稀有性,俄羅斯所產優質的亞歷山大變石是較昂貴的有色寶石之一。
Alexandrite is the rare variety of the mineral chrysoberyl that changes color in different lighting. Most prized are those alexandrite birthstones that show a vivid green to bluish green in daylight or fluorescent light, and an intense red to purplish red in incandescent light. Major alexandrite deposits were first discovered in 1830 in Russia’s Ural Mountains. The gem was named after the young Alexander II (1818–1881), heir apparent to the throne. Alexandrite caught the country’s attention because its red and green colors mirrored the national military colors of imperial Russia. (GIA- JUNE BIRTHSTONES)
證書:AGL 1097798
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