aventurin

plural aventurins

1. alternativecountableuncountableAlternative form of aventurine.

   Aventurin is also the name of a variety of quartz spangled with mica or other shiny mineral. A variety of spangled feldspar, found especially in Russia, and when polished used as a gem and highly prized, is also called Aventurin or popularly "sunstone".

   2003, “The Mineral Kingdom. Dictionary of Gems, Jewels, Precious Metals and Minerals, with Their Significance and Use in the Superstition and Folklore of All Countries”, in Cora Linn Daniels, C[harles] M[acClellan] Stevans, editors, Encyclopædia of Superstitions, Folklore, and the Occult Sciences of the World: […], volume II, Honolulu, Hi.: University Press of the Pacific, →ISBN, page 724, column 1

   1 more example

   Aventurin or avanturin glass was formerly made only in the Island of Murano, near Venice, but is now prepared throughout Germany, Italy, Austria, and France. It is a brown glass mass in which crystalline spangles of metallic copper according to [Friedrich] Wöhler (of protoxide of copper according to [Max Joseph] von Pettenkofer) appear dispersed. [...] The Bavarian and Bohemian glass-houses produce an aventurin glass rivalling the original.

   1877, [Johannes] Rudolf Wagner, “Division III. Technology of Glass, Ceramic Ware, Gypsum, Lime, and Mortar.”, in William Crookes, transl., A Handbook of Chemical Technology … Translated and Edited from the Eighth German Edition, with Extensive Additions, New York, N.Y.: D. Appleton and Company, […], →OCLC, page 291