Calcite on Siderite | Barras-Gautier-Min.https://static.wixstatic.com/media/daf8af_b602e3cd919f4fbcb271eb7ee69313a0~mv2.jpg/v1/fit/w_500,h_500,q_90/file.jpg Dimension: 3.8 x 2.5cm Origin: St Pierre de Mésage, Isére, France Calcite rhombohedron on siderite crystals, an association offering a good proportion and a perfect crystallization, very representative of this deposit. Dimensions without the acrylic base, which is supplied with the mineralogical specimen.