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dc.contributor.author
Sardi, Fernando Guillermo
dc.date.available
2020-09-23T18:03:23Z
dc.date.issued
2008-12
dc.identifier.citation
Sardi, Fernando Guillermo; The geological context of gems in the Velasco Pegmatitic District, Argentina; Gemmological Association of Great Britain; The Journal of Gemmology; 31; 3/4; 12-2008; 85-89
dc.identifier.issn
1355-4565
dc.identifier.uri
http://hdl.handle.net/11336/114646
dc.description.abstract
The Velasco Pegmatitic District is located in the Velasco range, La Rioja province, northwestern Argentina. The Velasco range is made up of several granitic units of different petrography, magmatic evolution and age among which are the Huaco and Sanagasta granites. The pegmatites in the Velasco district have a spatial and genetic relationship with these granites and belong to the rare-element class, beryl type, beryl-columbitephosphate subtype. The pegmatites are usually zoned and the K-feldspar zone is generally the most important for gem-quality beryl. Heliodor and aquamarine varieties are present and these crystals can be cut to yield products of attractive beauty. Other beryl crystals with poor transparency can be utilized for cabochons or tumble polished. Rock-crystal and rosequartz are also present in some pegmatites from the Velasco district.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Gemmological Association of Great Britain
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
AQUAMARINE
dc.subject
HELIODOR
dc.subject
GEMSTONE
dc.subject
VELASCO RANGE
dc.subject
PEGMATITE
dc.subject
ROCK CRYSTAL
dc.subject
ROSE QUARTZ
dc.subject.classification
Geología
dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
The geological context of gems in the Velasco Pegmatitic District, Argentina
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2020-04-22T14:46:59Z
dc.journal.volume
31
dc.journal.number
3/4
dc.journal.pagination
85-89
dc.journal.pais
Reino Unido
dc.journal.ciudad
London
dc.conicet.avisoEditorial
The Journal of Gemmology archive is now available for everyone to view online. The archive goes back to 1947 when the first issue of The Journal was published.
dc.description.fil
Fil: Sardi, Fernando Guillermo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto Superior de Correlación Geológica. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo. Departamento de Geología. Cátedra Geología Estructural. Instituto Superior de Correlación Geológica; Argentina
dc.journal.title
The Journal of Gemmology
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://gem-a.com/images/Documents/JoG/JoG2008_31_3-4.pdf
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