Buy Rainbow Amethyst Druse Geode with Calcite - 7cm, 235g UNIQUE CRYSTALS Zurich

This extraordinary rainbow amethyst with calcite is a rare and precious piece, especially in this delicate pastel color. The pink tones make it a unique collector's item.

Formation: Amethyst is a variety of quartz and forms in volcanic rock cavities rich in silicon dioxide. Through hydrothermal processes, the silicon dioxide in these cavities crystallizes, forming beautiful amethyst crystals. The characteristic violet color of amethyst is caused by trace elements of iron and natural radiation.

In some amethysts, such as this one, calcite crystals can form. Calcite often forms in cavities and cracks in the host rock, adding additional aesthetic and mineralogical diversity to the amethyst. The combination of these two minerals is rare and particularly intriguing, as the calcite beautifully complements the purple and pink hues of the amethyst.

The rainbow effect in amethysts is caused by natural cracks and inclusions in the crystal that refract and reflect light, resulting in a dazzling play of colors. These special crystal formations, which resemble flowers, are created by the even and slow deposition of quartz layers, often influenced by temperature fluctuations and the chemical composition of the surrounding water.