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Main jade producing countries. Jade is an umbrella term for two different types of decorative rocks used for jewelry or ornaments.Jade is often referred to by either of two different silicate mineral names: nephrite (a silicate of calcium and magnesium in the amphibole group of minerals), or jadeite (a silicate of sodium and aluminum in the pyroxene group of minerals). [1]
Jadeite is the principal mineral making up the most valuable form of jade, a precious stone particularly prized in China. Most gem-quality jadeite jade comes from northern Myanmar. Jade tools and implements have been found at Stone Age sites, showing that the mineral has been prized by humans since before the beginning of written history.
In the early days of jade carving, quartz, a mineral with a high hardness level, was the object of choice. [18] At the beginning of the Song dynasty, a time of prolific technology growth, "red sand", with a hardness level of 7.5 became the dominant tool of the industry. [20]
Jade Cove is located in the southern area of Big Sur on the California central coast. [1] It contains the only concentrated underwater deposit of quality nephrite jade in the world. [ 2 ] Individuals are permitted to collect as much jade as they can personally carry using hand tools up to 90 feet (27 m) deep offshore.
Citrine “A powerful gemstone crystal in a range of deep yellows, oranges, and yellow-cream-white, the citrine gemstone is said to bring abundance and wealth into one’s life,” Salzer says.
Pre-Columbian Jade in Costa Rica. André Emmerich Inc. NY 1968; Guerrero Miranda, Juan Vicinte. 1998. The Archeological Context in Costa Rica. In Jade in Ancient ited by Julie Jones, pp 23-37. New York: The Metropolitan Museum of Art. Mora-Marín, David. 2005. The Jade to Gold Shift in Ancient Costa Rica: A World Systems Perspective UNC-Chapel Hill
The Māori word pounamu is derived from namu, an archaic word that describes blue-green (or 'grue') cognate with Tahitian ninamu. [2] Pounamu, also used in New Zealand English, in itself refers to two main types of green stone valued for carving: nephrite jade, classified by Māori as kawakawa, kahurangi, īnanga, and other names depending on colour; and translucent bowenite, a type of ...
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