Amethyst with Calcite Crown — Kingston Mountains, CA

This is a truly singular specimen — a single prismatic amethyst crystal of deep smoky-purple coloration, its hexagonal form beautifully defined and semi-translucent, crowned at the top with a dramatic eruption of creamy yellow-white calcite crystals that cascade down one side like a frozen waterfall. The amethyst column itself shows classic growth striations along its prism faces, with rich zones of purple-gray depth that shift in changing light. A secondary phantom or ghost crystal is visible near the base, adding an extra layer of geological storytelling. Bright orange-gold iron oxide staining at the calcite-amethyst interface adds vivid contrast and speaks to the mineral-rich hydrothermal environment in which this piece formed. The Kingston Mountains of the Mojave Desert in San Bernardino County, California are a renowned location for unusual quartz varieties and associated secondary minerals. Hydrothermal veins cutting through the ancient Precambrian metamorphic and igneous basement rocks of the region have produced exceptional amethyst specimens, often with striking mineral companions. The calcite overgrowth here is likely a later-stage mineral deposition from calcium-rich fluids that circulated through the same vein system — a beautiful example of sequential mineralization. The iron oxide staining (likely goethite or limonite) tells of oxidizing conditions in the near-surface environment, adding warm gold tones that make this piece glow. This specimen comes from the C.W.B. Minerals collection and is a prized example of Mojave Desert mineralogy — a piece that bridges deep geological time with stunning surface beauty. It would be a standout addition to any serious mineral collection, equally at home in a display case or in the hands of someone who simply loves extraordinary rocks.