Large Amethyst Geode Cave – 19.66 lb | Uruguayan Specimen

This is a single, unrepeatable specimen. A natural amethyst geode cave from Artigas, Uruguay — 10 inches tall, rounded open formation, 19.66 lb, with the full crystal interior exposed and visible. When this piece is gone, there is no restock.

Specifications

• Weight: 19.66 lb / 8.9 kg
• Dimensions: 10 in (H) × 8 in (L) × 5 in (W)
• Origin: Artigas, Uruguay
• Crystal color: Lavender to deep purple, graduating toward the interior
• Formation type: Open cave — rounded geode with fully exposed crystal interior
• Exterior: Natural basalt shell with banded agate cross-section visible
• Base: Flat-cut — self-standing, no display stand required

What makes this piece rare

This is a true amethyst geode cave — a rounded, naturally formed cavity where the full crystal interior is open and exposed. Unlike a cathedral geode with tall vertical walls, the cave formation is wider than it is tall, with a soft, organic silhouette that reads differently in a space: more sculptural, less architectural.

The color range is one of this piece’s defining qualities. The crystals graduate from lavender amethyst tones at the outer edges to deeper, more saturated purple toward the interior — a natural color gradient that occurs when iron content varies across the crystal growth zone. It is the kind of tonal complexity that photographs beautifully and reads even better in person.

Sourced from Artigas, Uruguay — the region responsible for some of the world’s finest amethyst — this amethyst geode cave from Uruguay carries full provenance, traceable to its mine of origin.

Display and placement

At 19.66 lb and 8 inches wide, this purple amethyst geode display piece suits shelves, console tables, nightstands, and bathroom counters. The open cave formation invites close viewing — the interior catches light differently throughout the day, making it as dynamic as it is beautiful.

Ships with a certificate of origin verifying its source in Artigas, Uruguay.