历史文献清单:希腊劳里厄姆的古代银矿

关于希腊劳里厄姆古代银矿的加注文献清单

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GIA 知识交流:分享宝石学信息的新方式

对 GIA 专家而言,网络研讨会是一种轻松分享信息并与研究人员以及宝石和珠宝爱好者社区保持联系的非正式方式。

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历史文献清单:巴西钻石和黑金刚石(第 2 部分)

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历史文献清单:巴西钻石和黑金刚石(第 1 部分)

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照片背后的故事:巨型海蓝宝石和“华丽”的大自然

宝石学摄影记者 Robert Weldon(罗伯特·韦尔登)分享了他最喜欢的一些照片,并讲述了背后的故事。

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Investigations into Corundum and Beryl Color, Jade Artistry, the Chivor Emerald Mine’s History, and Swiss Rhodonite…

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Diamonds Are Not Forever! Diamond Dissolution

Violent kimberlite eruptions impact the surface features of diamonds, which can give scientists useful information about how diamonds react with the fluids in the mantle.

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Pallasitic Peridot with Iridescent Needle-Like Inclusions

Numerous needle-like inclusions exhibit vibrant interference colors in a suite of pallasitic peridot from the Jepara meteorite.

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Triplite in Beryl

Orange crystal inclusion identified as the rare mineral triplite in a beryl from Pakistan.

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Staurolite in Ruby

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Reversible Twinning in Neodymium Pentaphosphate

Application of slight pressure perpendicular to the twinning planes reveals the unusual property of this synthetic gem.

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Solid Carved Dark Gray Diamond Ring

A ring made entirely of natural diamond was recently submitted to GIA’s New York laboratory.

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Phenomenon Resembling Play-of-Color in Sapphire

A phenomenon resembling play-of-color was seen in a 4.13 ct unheated sapphire recently examined by the author.

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Diamond with Cavities Showing Radiation Evidence

Diamond formed at incredible depth shows evidence of radioactive fluids in cavities surrounded by green fluorescence halos.

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Bismuth Glass-Filled Burmese Star Ruby

The Hong Kong laboratory recently examined a Burmese star ruby incorporating a significant amount of bismuth glass.

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Quarterly Crystal: Unknown Inclusion in Triphane Spodumene

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History of the Chivor Emerald Mine, Part I (1880–1925): From Rediscovery to Early Production

Chronicles developments at the Chivor emerald mine in Colombia between 1880 and 1925, based on archival records.

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Color Characteristics of Blue to Yellow Beryl from Multiple Origins

Discusses the features of alkali elements and their influence on the color of blue to yellow beryl.

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A Quantitative Description of the Causes of Color in Corundum

Presents a quantitative means of determining the causes of color in a gem material, using corundum’s six major chromophores as an illustration.

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The Evolution of Chinese Jade Carving Craftsmanship

Explores the art form of jade carving in China across five periods from the late Neolithic Age to the present day.

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