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Título: Galena with calcite
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Galena is lead sulfide and the world's chief ore of lead. It is metallic, brittle and typically forms cube-shaped crystals in hundreds of localities. Galena has perfect cubic cleavage, and when broken nearly all the small bits can be seen to display a cube shape. The area underground in the vicinity of St. Joe, Missouri is host to a number of lead and zinc mines, in which galena, sphalerite, calcite and fluorite are abundant and well crystallized.
Crédito: Album / Science Source / JOEL AREM
Tamaño imagen: 3855 × 2553 px | 28.2 MB
Tamaño impresión: 32.6 × 21.6 cm | 1517.7 × 1005.1 in (300 dpi)