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Americanas

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Amethyst
紫水晶
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紫水晶的成分是二氧化硅，硬度7 ，比重2.65，折射率1.54-1.55，具二向色性。从不同角度观赏，可显示出蓝或红的紫色调，通常以混合式或阶式做成刻面。天然产出的紫水晶因含铁、锰等矿物质而形成漂亮的紫色，主要颜色有淡紫色、紫红、深红、大红、深紫、蓝紫等颜色，以深紫红和大红为最佳，过于淡的紫色则较为平常。天然紫晶通常会有天然冰裂纹或白色云雾杂质。具有宝石价值的紫晶均产在火山岩、伟晶岩、或灰岩、页岩的晶洞中。紫晶在自然界分布广泛，主要产地有巴西、俄罗斯、南非、马达加斯加。全球最大最完美无瑕的一颗刻面紫水晶，尺寸：71.5mm×58.5mm×46.3mm，切割成刻面大水滴形状。重量1030克拉，产地斯里兰卡，深紫色带粉色调，颜色饱和浓艳。切割打磨比例标准，内部极为纯净。这颗宝石是目前为止全世界最大最完美的刻面紫水晶，也是世间罕见水晶精品中的精品。 
中文名
紫水晶
外文名
amethyst
别    称
紫水玉、紫水精、紫水碧、
类    别
二氧化硅
化学式
SiO2
颜    色
紫红、深紫、蓝紫、深红等
条    痕
无色
晶    系
三方晶系
解    理
无解理
断    口
贝壳状
硬    度
7
晶体惯态
固体
矿物密度
2.56-2.66
比    重
2.65
分    布
米纳斯和吉拉斯、马达加斯加、阿肯色州、俄罗斯的乌拉尔、缅甸等
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Amoreiras Shopping Center
Amoreiras 购物中心
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André Mouche
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Anson´s
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Apple
苹果公司
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Apple Watch
蘋果手錶 苹果手表

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Arabia
阿拉比阿
1874
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Arbat
阿尔巴特大街
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Arbutus
愛彼特 爱彼特

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Arena
阿瑞娜
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