Sapo, town of Padre Paraiso, province of Minas Gerais. For the past several years, my favorite brazilian dealer at the Tucson and Denver shows has brought giant pegmatite clusters of feldspar, siderite and fluorite crystals weighing upwards of 100 pounds. The siderite separates easily from the feldspar and cleaves into these excellent, glossy rhombs just like their chemical cousin calcite does. Pleasing color hues. 1 1/2 inches on a side. This year, at the Denver show, he told me that there will be no more of this material. Sid 9.18