AMETHYST WITH CALCITE

Ametista do Sul is, true to its name, recognized as the amethyst-producing capital of the world. Here we have deep purple amethyst crystals, displaying an unusually rich saturation reminiscent of Uruguayan material, forming a complete carpet across the specimen's face. These are dramatically accented by exceptional calcite crystals reaching 12 cm, their gem-like transparency creating a striking contrast against the amethyst backdrop. While specimens from this prolific region are well-known, this particular piece stands several cuts above the norm, possessing the size and aesthetics to command center stage in any serious mineral display.   More info: The mineralization sequence in Ametista do Sul's basalt cavities proceeds in distinct stages. Initial hydrothermal fluids deposit celadonite, followed by primary quartz crystallization. Subsequent radiation-induced oxidation of iron within the quartz structure produces amethyst. The final phase introduces calcium-rich solutions, resulting i