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Research on the origin and occurrence of gems and jades is one of the hottest topic in geology, gemmology and archaeology.

摘要玉石产地来源是近年地和考古热门话题之一。

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arrie&2&re-ban, arrie&2&re-pensee, arriere-ban, arrière-ban, arriere-pensee, arrière-pensée, arriero, arris, arrish, arrissing,

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3G, 401(K), a,

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Some materials that are culturally prized as gems aren't minerals or gems in the strictest geological sense: things like amber, jet, coral, and pearl.

有些材料在文化意义被视为矿,但从严格的角度,例如:琥珀、煤精、珊瑚和珍珠。

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2005 English Cafe

The Gemological Institute of America, sometimes known as the GIA (not to be confused with the CIA – the Central Intelligence Agency) is the leading authority in gemology in the United States.

美国学院,有时也称为 GIA(不要与中央情报局 - 中央情报局混淆)是美国的主要权威机构。

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arrivederci, arriver, arrivisme, arriviste, ARRL, arroba, arrogance, arrogancy, arrogant, arrogantly,

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3G, 401(K), a,
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