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A paraiba tourmaline and diamond ring, in platinum. The neon Paraíba tourmaline has also been found in the neighboring state of Rio Grande do Norte. In the early 2000s, tourmaline gems containing copper and bearing similar colors were found in Nigeria and Mozambique. [63] Initially, the nomenclature for this tourmaline was "Paraíba tourmaline".
The new type of tourmaline, which soon became known as paraiba tourmaline, came in blue and green. Brazilian paraiba tourmaline usually contains abundant inclusions. Much of the paraiba tourmaline from Brazil does not actually come from Paraíba, but the neighboring state of Rio Grande do Norte. Material from Rio Grande do Norte is often ...
Elbaite, a sodium, lithium, aluminium boro-silicate, with the chemical composition Na(Li 1.5 Al 1.5)Al 6 Si 6 O 18 (BO 3) 3 (OH) 4, [4] is a mineral species belonging to the six-member ring cyclosilicate tourmaline group.
This is a list of artists who were born in the Vietnam or whose artworks are closely associated with that country.. Artists are listed by field of study and then by family name in alphabetical order (review Vietnamese naming customs as the family name will display in the first name field, with exceptions including people of the diaspora), and they may be listed more than once on the list if ...
Việt-nam bách-khoa từ-điển (Encyclopedia of Vietnam), a set of encyclopedias with annotations in Chinese, English and French by Đào Đăng Vỹ, a Vietnamese scholar; published from 1959 to 1963 in Saigon, Republic of Vietnam. [3] [4]
Rubellite used to be the most expensive and prized gem in the tourmaline group but has since been eclipsed by the Paraiba tourmaline. [7] [8] The most valuable specimens are colored red and lack brown. [3] Those that are of ruby color are the most valuable. [9]
The Vietnamese Wikipedia (Vietnamese: Wikipedia tiếng Việt) is the Vietnamese-language edition of Wikipedia, a free, publicly editable, online encyclopedia supported by the Wikimedia Foundation. Like the rest of Wikipedia, its content is created and accessed using the MediaWiki wiki software.
Chữ khoa đẩu is a term claimed by the Vietnamese pseudohistorian Đỗ Văn Xuyền to be an ancient, pre-Sinitic script for the Vietnamese language. Đỗ Văn Xuyền's works supposedly shows the script have been in use during the Hồng Bàng period, and it is believed to have disappeared later during the Chinese domination of Vietnam .