	*(1996)The Journal of Gemmology* Vol. 25 (4) Gem-A**	Journal (issue)
	crystal, 75 mm long,from the Cruzeiromine,Minas Gérais,Brazil.See 'The location, geology and mineralogy...mineralogy of gemtourmalines inBrazil' on pp. 263-98ISSN: 1355-4565262J. G e m m , 1996, 25, 4...location, geology and mineralogy of gemtourmalines inBrazilJacques P. Cassedanne, Dr. Sc. *, and Maurice Roditi...inner parts of the pegmatites, on eachside of aquartz core or concentrated inpockets, which are variable...variably perthitized, albite, muscoviteand milkyquartz with some lepidolite,schorl and locally huge tabular
	(1994) May - June 1994.The Mineralogical Record Vol. 25 (3) The Mineralogical Record, Inc.	Journal (issue)
	85741ArticlesThe Jaguaragu pegmatite,MinasGerais,Brazil ............................. 165by J....185by B. M. EnglandCopper roses from the Rosemine,near San Lorenzo, New Mexico ....................white calcite matrix from theCoscuezmine, Muzo, Colombia. Thismine islocated 12 km north, on the other...other side of themountain, from the famous Muzomine (see thearticle on the Colombian emerald districts...of the site. This process will not only make themineextremely difficult or impossible to enter, it will
	*O'Donoghue, Michael (1988)Gemstones. Chapman and Hall.*	Book
	example is very rare indeed compared to salt orquartz, but not compared to ruby, the particular conditions...of it crystallizes as free silica in the form ofquartz, as in a granite.Along with the increasing silica...stone came from — some¬times down to the actualmine. Today it is commonplace to see in salecatalogues...crystals (resembling bamboo stalks) in some emerald,quartzand garnet• anatase in rock crystal• apatite...fuchsite inquartz, emerald and corundumpyrite in corundum and emeraldrutile inquartzspinel in ruby
	*O'Donoghue, Michael (1988)Gemstones. Chapman and Hall.*	Book
	example is very rare indeed compared to salt orquartz, but not compared to ruby, the particular conditions...of it crystallizes as free silica in the form ofquartz, as in a granite.Along with the increasing silica...the stone came from - sometimes down to the actualmine. Today it is commonplace to see in salecatalogues...crystals (resembling bamboo stalks) in some emerald,quartzand garnet• anatase in rock crystal• apatite...fuchsite inquartz, emerald and corundumpyrite in corundum and emeraldrutile inquartzspinel in ruby

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Tourmalinated Quartz fromUrubu mine, Monte Belo, Itinga, Minas Gerais, Brazil

Tourmalinated Quartz from
Urubu mine, Monte Belo, Itinga, Minas Gerais, Brazil