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Aerinite

Posted by Rock Currier  
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Rock Currier January 15, 2009 08:54AM
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This article is a place holder and needs someone to take it in hand and finish the first draft. If you would like to take this article in hand, leave a reply message below or contact Rock Currier via private message by clicking on the PM button next to my name at the top of the article.




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Can you help make this a better article? What good localities have we missed? Can you supply pictures of better specimens than those we show here? Can you give us more and better information about the specimens from these localities? Can you supply better geological or historical information on these localities?


Aerinite Rare species collections.
Ca4<(Mg,Fe2+,Mn)(Al,Fe3+)>10Si12O35(CO3)(OH)12·12H2O
A calcium aluminum iron magnesium hydrous hydroxy silicate carbonate. The name means bright blue, the color of the mineral that is said to be distinctive. The mineral was named as far back as 1982 for material from the Pyrenees mountains in France. “As masses of cryptocrystalline fibers; earthy, compact.”1 The Handbook also lists localities in Morocco, Arizona and several localities in Spain.
1. Handbook of Mineralogy, Volume II, Silica, Silicates, Part 1, Anthony, Bideaux, Bladh, Nichols, p5.


AeriniteFranceLandaus, Saint-Pandelon
Aerinite, FOV 10 mm
Aerinite & Scolecite FOV 1cm

Over the years the mineral lost its status as a legitimate mineral because it was thought that the mineral was a mixture of silicates, but 1988 new work by B. Azambre, and P. Monchoux was accepted as correct by the CNMMN and it was resurrected as a valid species. “The mineral occurs as blue to blue-green fibers associated with scolecite and prehnite in a tholeiitic dolerite.”1
1. American Mineralogist, Vol.73, p.1498, 1988.


AeriniteSpainCadiz and Malaga Province, Antequera-Olvera Ophite near Malaga
The region of Spain between the Antequera and Olvera have produces some interesting minerals. The crystals are dipyramidal to pseudocubic. “The typical crystal size ranges from 5 mm to 1.5 cm; kidney-shaped to botryoidal masses up to 3 cm have also been found in the Olvera region. The color varies from deep blue to sky-blue with typical vitreous luster. Blue quartz occurs strictly as fracture fillings and in small vugs with fibrous aerinite and carbonates.”1 The Mineralogical Record article cited here shows photos of a number of nice specimens. Locally the specimens are not considered rare. Fine ones of good color and luster are scarce however.
1. Mineralogical Record, Vol. 27, 1996, p 103.


AeriniteSpainAragón, Huesca Province, Ribagorça (Ribagorza), Estopanyà (Estopiñán)

Aerinite crust, 5 cm tall.
Aerinite, 8.5 cm across


Aerinite, FOV 5cm



Blue crusts. “…it occurred filling fractures in ophite associated with scolecite and prehnite. It is considered a hydrothermal mineral of the zeolite facies. It was also found in the same province at Juseu and Estinopiñan. The material from these localities was fairly abundant and in large cabinet size pieces if you particularly wanted one. This may have been the best and most abundant locality to date.1
1. Personal communication with Forest Cureton.



Click here to view Best Minerals A and here for Best Minerals A to Z and here for Fast Navigation of completed Best Minerals articles.

Rock Currier
Crystals not pistols.



Edited 8 time(s). Last edit at 12/28/2012 08:12PM by Rock Currier.
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