Chalcedony from Peru, Moquegua, Rumipata

Rumipata, Ichuña District, General Sánchez Cerro Province, Moquegua, Peru

Own a genuine piece of geological and collecting history with this exceptional chalcedony pseudomorph after anhydrite from Rumipata, Ichuña, Peru. This locality is renowned for producing rare and highly aesthetic silica replacements, and this specimen is a standout example.

In this piece, chalcedony has completely replaced the original anhydrite crystal while preserving its external form — a true pseudomorph. The surface shows smooth, softly botryoidal textures with blue‑lavender tones that are characteristic of Rumipata material.

What elevates this specimen far beyond typical pseudomorphs is its provenance: This is a 1700s old‑stock piece, originating from one of the earliest documented mineral collections from the region. Specimens from this era are extraordinarily scarce, as most early collections were dispersed or lost over time.

A rare opportunity to acquire a historically significant Rumipata pseudomorph with exceptional color, form, and provenance — the kind of piece that rarely appears on the modern market.