Large Deep Purple Amethyst with Calcite – 20.63 lb | Uruguayan Geode

A Geologically Rare Deep Purple Amethyst Geode from Artigas, Uruguay

This 20.63 lb deep purple amethyst geode from Artigas, Uruguay carries a geological feature that sets it apart from any standard specimen: a natural calcite formation growing directly from within the crystal cluster. This secondary mineral growth — white, opaque, and structurally distinct from the surrounding amethyst — formed over millions of years as mineral-rich fluids moved through the geode cavity. It is the kind of inclusion that transforms a beautiful piece into a true collector’s specimen.

The surrounding crystal bed displays deep purple amethyst points of exceptional density and saturation, darkening toward near-black at the core. The natural agate banding on the exterior wall is clearly visible, revealing the full geological cross-section of this Uruguayan specimen.

The flat-cut base allows secure, stand-free display. At over 20 lbs, this piece commands presence in any space — from a collector’s cabinet to a luxury interior. Entirely one of a kind.

Specifications

• Weight: 20.63 lb / 9.36 kg
• Formation: Geode, flat cut base
• Crystal color: Deep purple, near-black at core
• Special features: Natural calcite formation growing within the crystal cluster, banded agate exterior
• Origin: Artigas, Uruguay
• Self-standing: Stable flat-cut base — no stand required
• Traceability: Certificate of origin — emporiongems.com/pages/traceability