190 g Amethyst Cluster with Goethite

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Dimensions (inches): 3.25 x 2.5 x 2.25

Weight: 190 grams

Locality: Rio Grande do Sul, Brazil

Goethite Crystal System: Orthorhombic

Goethite Chemical Formula: α-Fe3+O(OH)

Amethyst Crystal System: Trigonal

Amethyst Chemical Formula: SiO2