Mineral: Opal (variety boulder opal)
Locality: Yowah opal field, Paroo Shire, Queensland, Australia
Dimensions: 7.5 x 8 x 2 cm

Description: Mass: 265 g MIM number:1756 "Yowah nut" boulder opal split in two halves of very similar sizes (130 g and 135 g) showing the opalized veins running through the ironstone matrix with green and blue reflections. Photographer: AINU / Augustin de Valence Publication: "101 Minéraux et Pierres Précieuses qu'il faut avoir vus dans sa vie", "Minéraux - Le Guide des Passionnés", "Paragénesis - Revista de Mineralogía 2019-2" Ex collection Müller (Germany)

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