mineral

Polished brecciated turquoise-like copper mineral

Likely chrysocolla–malachite–limonite assemblage; possibly turquoise-bearing copper ore

AI-generated identification · may be incorrect

Blue-green, yellow-brown, and dark matrix with irregular brecciation and a waxy to earthy luster. Individual minerals are generally soft: chrysocolla ~2–4 Mohs, malachite ~3.5–4, turquoise ~5–6; no reliable crystal faces are visible.

Identified August 17, 2026More mineral →

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Physical properties

Formation & geological history

Forms in oxidized zones above copper deposits, where acidic groundwater alters copper sulfides and fills fractures with secondary copper minerals. The specimen is likely natural but cut or polished; age cannot be determined from an image.

Uses & applications

Used as an ornamental cabochon or collectible copper-mineral specimen; turquoise-quality material may be used in jewelry, while lower-grade material is mainly decorative.

Geological facts

The vivid blue-green coloration is characteristic of hydrated copper minerals. It may be sold commercially as “Sonoran turquoise,” “chrysocolla,” or “chrysocolla-malachite,” but visual identification alone cannot distinguish these reliably.

Field identification & locations

Likely identification requires hardness, streak, density, and ideally Raman/XRF testing. Around 45.5°N, 16.4°E (Croatia), copper-bearing minerals are plausible but this polished material could have been imported; do not assume local origin.