The Japanese jadeites were compared to samples from Myanmar, Guatemala, and Russia. In trace-element analysis, chondrite-normalized and primitive mantle–normalized patterns in lavender, violetish blue, and blue jadeite from Japan showed higher large-ion lithophile element contents (Sr, Ba) and higher field strength element contents (Zr, Nb) than those in green jadeite, while white and black jadeite had relatively low REE contents. A blue jadeite from Wakasa had a range of 97 to 91 and a similarly high TiO 2 concentration. Whereas lavender samples had a jadeite composition of X Jd = 98 to 93 and tended to be high in TiO 2 and FeO tot and low in MnO content, blue jadeite showed the highest TiO 2 concentration at 0.65 wt.% and had an X Jd range of 97 to 93. The maximum CaO content in green jadeite was 5 wt.%, and its chromophores were Fe and Cr. Green jadeite from the same location had an X Jd range from 98 to 82. White jadeite from Itoigawa-Omi was close to pure jadeite (X Jd = 98, or 98% jadeite composition). In this study, jadeite from the Itoigawa and Omi regions in Niigata Prefecture and the Wakasa region in Tottori Prefecture, both on Japan’s western coast, were divided into several color varieties corresponding to chromophores and mineral phases: white (nearly pure jadeite), green (Fe-rich, Cr-bearing), lavender (Ti-bearing), blue (Ti- and Fe-bearing), and black (graphite-bearing). ABSTRACTĮven though Japanese jadeite lacks the transparency of the highest-quality Burmese imperial jadeite, its rarity and natural features make it a highly valued gemstone.
This boulder weighs 40.5 kg and measures approximately 39 cm high, 32 cm long, and 26 cm wide. A large, attractive jadeite boulder from Itoigawa, Japan, characterized by mixed white and green colors. Manage Your GIA Alumni Association™ Membershipįigure 1. If you have any of the cc listed and are willing to share, you can send me the link via my ask box, or private messaging.Comprehensive CAD/CAM For Jewelry Certificate The following is a list of cc simmers have privately messaged and asked me.
0 kommentar(er)
