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Light blue to bluish green: Brazilian indicolite variety (from indigo) Green: Brazilian verdelite variety (from emerald ) Watermelon tourmaline is a zoned variety with a reddish center surrounded by a green outer zone resembling watermelon rind , evident in cross-sectional slices of prisms, often displaying curved sides.
For example, blue indicolite tourmaline is the only blue gemstone of any kind that will show a drag response when a neodymium magnet is applied. Any blue tourmaline that is diamagnetic can be identified as paraiba tourmaline colored by copper in contrast to magnetic blue tourmaline colored by iron. [22]
Best for wedding jewelry: Blue Nile. Best for fine jewelry: James Allen. Best for USA-made jewelry: Allurez. Best for sustainable jewelry: GLDN. Best for simple jewelry: Catbird.
Bahia Emerald [2]; Carolina Emperor, [3] [4] 310 carats uncut, 64.8 carats cut; discovered in the United States in 2009, resides in the North Carolina Museum of Natural Sciences, Raleigh, NC, US
Fordite, also known as Detroit agate, Motor City agate, [1] paint rock, or paint slag, [2] is a lapidarist term for polished pieces of finely layered paint masses from automobile factories. The masses consist of automotive paint which has hardened sufficiently to be cut and polished.
Gadolinite; Gahnite; Gahnospinel; Garnet group: Pyralspite. Almandine; Pyrope; Spessartine; Ugrandite. Andradite. Demantoid; Melanite; Topazolite; Grossular ...