... of graphite and nephrite jade to important scientific institutions in Paris as trophies of the expedition. While a few written sources are available, I will directly question these visual and material sources to situate this case study within the context of its time, and of Earth sciences’ progress...

...Guanghai Shi; Ru Jia; M. Santosh; Huan Liang; Huaiyu He Abstract Nephrite jade is of wide interest, not only for its value as a highly valued precious stone, but also for its significance in tracing geological and petrological processes. Here, we report the first discovery of a nephrite deposit...

... that ascended in the subduction zone and were exhumed at Hpakant and Nat Hmaw, bordering the Jade Mines Uplift. Subduction of the Indian Ocean since Albian time generated the Popa–Loimye arc, while extensional faulting led to uplift of the Indo-Burman Ranges and to the formation of the Western Tin Belt granites...

... relevance, however, is important. A new petrographic classification of these H P metamorphic lithotypes is presented here, which is consistent with the recommendations of the SCMR. Two simple diagrams are suggested, which are useful to classify “ jades ”, mainly consisting of Na-pyroxenes, and rocks mainly...

... intensity vs. 2θ plots for mineral identification by comparison with the International Centre for Diffraction Data (ICDD) database (via Bruker’s DiffractPLUS EVA evaluation software). Guyanaite mantle xenolith subduction jade kosmochlor carmichaelite Colorado Plateau Guyanaite...

... for jade , the most prized gem from the Far East and worldwide exceeded in price only by diamond. Historically, the term jade was applied to any of a number of ornamental materials that could be carved, in particular to nephrite , a variety of the tremolite–actinolite amphibole series with general...

... – jadeite jade. It is very unusual with respect to both pyroxene composition and minor mineral constituents. Pyroxene compositions lie essentially along the jadeite–aegirine join: Jd 94 Ae 6 to Jd 63 Ae 36 , and without any coexisting omphacite. This contrasts with Jd-Di or Jd-Aug compositional trends...

...George E. Harlow; A. Reg Murphy; David J. Hozjan; Christy N. de Mille; Alfred A. Levinson Abstract Excavation of ornamental and gem materials from workshop sites on the island of Antigua, West Indies, also uncovered jade celts (axe forms) and fragments thereof. All are jadeite jades (jadeitite...

...Cuthbert J. Wilkins; W. Craighead Tennant; Bryce E. Williamson; Catherine A. McCammon Abstract Infrared, optical absorption spectroscopy, and Mössbauer spectroscopy were used to investigate the color of jade from New Zealand. Spectroscopic results were supplemented by chemical analyses...

...Tzen-Fu Yui; Sung-Tack Kwon Abstract The Chuncheon nephrite deposit in Korea is among the largest nephrite jade deposits worldwide. The deposit is hosted in Precambrian dolomitic marble and amphibole schist that were intruded by the posttectonic (Late Triassic) Chuncheon granite. Carbonates...

...Chiu Mei Ou Yang Abstract Ureyite, a chromium sodium pyroxene of the jadeite group, has been detected in four samples of opaque bright green to dark green Burmese jade. It is a fine-grained fibrous aggregate, intergrown with amphibole, chromite and other minerals. The specific gravity is 3.51–3.52...