星光红宝石的星光红宝石简介

2025-02-09 10:43:02
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回答1:

英文名称star ruby
天然红宝石大多来自亚洲(缅甸、泰国和斯里兰卡)、非洲和澳大利亚,美国蒙大拿州和南卡罗莱那州也有部分生产。天然红宝石非常少见且珍贵,但是人造并非太难,所以工业用红宝石都是人造的。
颜色:深红色。光泽:玻璃光泽晶体形态:三方晶系条痕:白色硬度: 9,极硬,仅次于莫桑石和钻石(钻石硬度为10,莫桑石硬度介于钻石和红宝石之间。)比重: 3.97 g/cm- 4.05 g/cm断口:不均匀或贝壳状端口光性:U—(一轴晶负光性)。特殊光学效应:星光效应,在光线的照射下会反射出迷人的六射星光或十二射星光,变色效应摩氏硬度为:9,SG(相对密度):3.99-4.00解理:无解理,底面裂理发育。发光性:红宝石在长、短波紫外线照射下发红色及暗红色萤光。吸收光谱:Cr的典型的吸收光谱。688nm 690nm吸收双线 668nm 659nm有吸收弱线 以550nm为中心的吸收宽带(黄绿区吸收) 蓝区476nm 475nm 468nm 紫区吸收。色彩来源:微量铬使它显红色,铬含量越高越红,最红的俗称“鸽血红”。 象征意义:高尚、爱情、仁爱。称号:“宝石之王”。出生地:主要为火成岩或变质岩地区。
具有星光效应的红宝石。通常为不透明或微透明,因含有三组相交成120°的平行排列的金红石纤维状包裹体,因此当垂直晶体c轴加工成弧面型宝石时,可见有六射星光。以斯里兰卡所产的质量较优,但色泽不及缅甸产,常红中略带紫。美国自然博物馆存有一颗重达100克拉的星光红宝石。
凡经过切割和琢磨的弧面型,具有星光效应的红宝石均为星光红宝石。对星光红宝石的颜色要求可以放宽,因为这种宝石中的针状、丝绢状包裹体使宝石透明度降低,多数为不透明至半透明,并趋向变灰,使原来的颜色变浅或变深。许多达不到真正红宝石颜色者,只要具有清晰、明亮而集中的星光,均可视为“星光红宝石”。具有猫眼效应的红宝石偶尔也能见到。
缅甸抹谷星光红宝石,是世界上所有红宝石产地(缅甸,斯里兰卡,泰国,澳大利亚,中国)中唯一有星光的红宝石,世界五大珍辰石之一,晶莹剔透,吉祥如意。仅凭宝石中独有的两种包裹体(绢丝状金红石包裹体,及形成的六射星光和乳白色絮状斑块;弥漫状气液包裹体,而形成较高的透明度,致使价格昂贵。),就能够和其他产地的红宝石区别开来。颜色鲜明但不均匀,常见平直的色带,多色性明显,肉眼从不同的方向观察,可以见到两种不同的颜色,有:鸽血红,玫瑰红,粉红,猪血红。世界宝石学会定红宝石为七月的生辰石。日本人选其为结婚40周年(红宝石)、52周年(星光红宝石)的珍贵纪念品。价格和重量成正比,即越重越贵。每克拉100--500美元。

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