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An amethyst geode from Santa Catarina, Brazil, with clear white calcite crystals growing as a second generation on its violet inner wall. A two-mineral genesis with clear visual stratigraphy.
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An amethyst geode from Santa Catarina, Brazil, with clear white calcite crystals growing as a second generation on its violet inner wall. A two-mineral genesis with clear visual stratigraphy.
Amethyst first crystallized in the lava geode from silica-rich solutions. Only after this phase was completed did calcium-carbonate-bearing solutions penetrate the remaining cavity, allowing the calcite scalenohedra to grow as a later generation.
The calcite crystals visible here show the trigonal scalenohedral form typical of carbonates, with clear longitudinal striations. Their clarity indicates a pure, undisturbed crystallization phase.
Santa Catarina in southern Brazil is an established amethyst deposit. The association with clear calcites is valued in the collector's trade as a didactic multi-generational piece.
A collector's item with clear mineralogical stratigraphy.
Wir beziehen unsere Kristalle direkt aus den Minen, ohne Zwischenhändler. Mehrmals im Jahr sind wir persönlich vor Ort und kennen die Familien, die diese Steine zutage fördern.
Sie erhalten einen fairen Preis für ihre Arbeit. In unseren Minen arbeiten ausschließlich Erwachsene unter sicheren Bedingungen, und davon überzeugen wir uns bei jedem Besuch.
Wie das vor Ort aussieht, zeigen wir in einem Film, der bei uns im Museum läuft.
Protect from direct sunlight, may fade. Acid-sensitive calcite matrix. Dry clean with a soft cloth.
Silikat (Quarz-Gruppe)
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