Grey Amethyst Geode – Microcrystalline Cavity with Primordial Patina - Height: 315 mm - Width: 190 mm- 5444 g

This formation comes from Uruguay, but it belongs to a particular chapter of its geology: that of the fine silica geodes, where amethyst does not manifest in its classic form of visible crystals, but as a microscopic and compact weave, a uniform veil covering the interior of the cavity like stardust. At first glance, it looks like a lunar fragment, a silica basin carved by a slow and precise event. In reality, it is the result of an initial hydrothermal phase, where silica precipitates in microcrystalline, almost amorphous form, creating a velvety, dark surface that does not reflect but absorbs light with depth. Inside the cavity, ancient signs can be seen: tension lines, small undulations, depressions where water has stagnated just a little longer, depositing a film of very fine quartz. In some areas, the silica thickens, revealing slight botryoidal concentrations, like barely hinted sprouts. It is an archaic landscape, an embryonic phase of the geode, which has never reached crystalline maturity.