Mineral: Quartz (goldschmidt twin)
Locality: Corinto, Curvelo, Minas Gerais, Brazil
Dimensions: 9 x 2.5 x 12 cm / main crystal: 11.5 cm

Description: Mass: 399 g MIM number:2074 Two flattened quartz crystals forming a rare twin called Goldschmidt twin with an angle of 47 ° 43 '(to be compared with the much more common Japan law twin forming an angle of 84 ° 33'). This twin is characterized by the parallelism of two edges of one of the quartz with two of the edges of the second one. Photographer: AINU / Augustin de Valence

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