ML316 Prase

Code: ML316

  綠蛋白石Name   Chrysoprase
化學公式   SiO2Chemical Formula   SiO2
莫氏硬度   6.0–7.0Mohs scale of Hardness   6.0–7.0
是玉髓(一種隱晶形式的二氧化矽)的寶石品種,其中含有少量的鎳。它的顏色通常為蘋果綠,但會變為深綠色。綠水晶蛋白酶的較暗的品種也稱為綠蛋白酶。 (但是,術語prase也用於描述包含亞氯酸鹽的石英,在一定程度上是顏色的描述,而不是嚴格定義的礦物品種。)Description is a gemstone variety of chalcedony (a cryptocrystalline form of silica) that contains small quantities of nickel. Its color is normally apple-green, but varies to deep green. The darker varieties of chrysoprase are also referred to as prase. (However, the term prase is also used to describe chlorite-included quartz, and to a certain extent is a color-descriptor, rather than a rigorously defined mineral variety.)
小挑戰 哪裡是產地 鎳綠玉髓產地有:澳大利亞、德國、波蘭、俄羅斯、美國、巴西、日本西部、而台灣花東是以含矽孔雀石(銅礦的一種次生物)的綠玉髓。至於鉻綠玉髓,目前發現的產地有津巴布韋、馬達加斯加、南非、俄羅斯。Challenge Where can find? The best-known sources of chrysoprase are Indonesia, Queensland, Western Australia, Haneti Tanzania, Germany, Poland, Russia, Arizona, California, and Brazil. Deposits in central Tanzania have been in constant production since 1986. The chrysoprase and Ni silicate ore deposit in Szklary, Lower Silesia, Poland, was probably the biggest European chrysoprase occurrence and possibly also the biggest in the world.