Large blue kyanite crystals on quartz from Barra de Salinas, Minas Gerais, Brazil. Originally from the Hawthorneden Collection. One large vertically placed crystal 7. 2 mm long. One horizontally placed crystal 65 mm long. 6 or 7 other smaller crystals. Dimensions: 73 mm x 79 mm x 51 mm. Stunningly gorgeous specimen. Our collection Number MIN-84. The weight of the specimen is 187 grams.