Chrysocollar硅孔雀石是铜矿物的蚀变产物,是一种含水硅酸铜矿物。单斜晶系,晶体极少见,通常呈无定形胶体,以钟乳状、土状或石英中的染色形态产出,常与孔雀石及蓝铜矿共生。硅孔雀石颜色以绿色和蓝绿色为主,含杂质多时可呈褐色、黑色。一种含有硅孔雀石的石英、玉髓或欧泊,硬度高,颜色漂亮,常被切磨成素面宝石,价格十分昂贵。......
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Phenakite
硅铍石是一种稀有的硅酸铍矿物,产于伟晶岩和云英岩中。英文名称于1833年取自希腊语“欺骗”的意思。因酷似水晶曾被误认,而后就有“似晶石”之称。三方晶系,晶体常呈菱面体状、短柱状、板状,普遍存在穿插双晶,呈现六方晶体的假象。透明至半透明,玻璃光泽。颜色以无色或酒黄色为主,也有浅粉红色、浅蓝绿色和褐色等。硅铍石透明晶体常被切磨成刻面宝石,其闪光几乎接近钻石,不过没有钻石般的火彩,可用于镶制首饰,但更多是作为收藏。
宝石级硅铍石产地不多。巴西产出无色大晶体,俄罗斯产出粉红色的晶体,斯里兰卡曾发现一块重1470克拉黄色巨砾,被切磨成569克拉椭圆形刻面宝石,现存于美国华盛顿史密森国家博物馆。硅铍石宝石常见针硫铋铅矿和片状云母内含物。
·双晶柱状硅铍石晶体
·硅铍石呈现六方短柱状晶体假象
Phenakite is a rare beryllium mineral named after the Greek word“phenakos”, meaning “deceiver”, because phenakite is often mistaken for quartz. Phenakite occurs in pegmatites, granites, and mica schists and can be colorless, yellow, pink or brown. When faceted,its brilliance approaches that of diamond, although it has none of diamond’s fire. The largest phenakite stone ever discovered, a 1470-carat yellow stream pebble, was found in Sri Lanka and faceted into a 569-carat oval gem.
·硅铍石中的针状内含物和片状云母内含物
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Chrysocollar硅孔雀石是铜矿物的蚀变产物,是一种含水硅酸铜矿物。单斜晶系,晶体极少见,通常呈无定形胶体,以钟乳状、土状或石英中的染色形态产出,常与孔雀石及蓝铜矿共生。硅孔雀石颜色以绿色和蓝绿色为主,含杂质多时可呈褐色、黑色。一种含有硅孔雀石的石英、玉髓或欧泊,硬度高,颜色漂亮,常被切磨成素面宝石,价格十分昂贵。......
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