mineral

Polished seam agate with druzy quartz and iron-oxide inclusions

Quartz (SiO₂), chiefly chalcedony with crystalline quartz and iron oxides/hydroxides

AI-generated identification · may be incorrect

Hardness 6.5–7 Mohs; gray-white chalcedonic rind surrounds rusty orange-brown, metallic-looking inclusions and small sparkling druzy crystals. Waxy to vitreous luster, microcrystalline quartz structure, no obvious cleavage; density about 2.6 g/cm³.

Identified August 30, 2026More mineral →

Explore Polished seam agate with druzy quartz and iron-oxide inclusions in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

At a glance

Common name: Polished seam agate with druzy quartz and iron-oxide inclusions
Scientific name: Quartz (SiO₂), chiefly chalcedony with crystalline quartz and iron oxides/hydroxides
Category: mineral
Identified: August 30, 2026
Method: Standard

AI Estimated Value

Approximately $5–$25 for a small common polished piece; $30–$100+ if the locality, color contrast, and druzy display are exceptional.

Not an official valuation

AI estimate for general interest only — not an appraisal. Actual value depends on condition, provenance, and market demand. Verify with a professional before buying, selling, or insuring.

This identification was generated by AI and may contain errors. Verify important details before relying on them — and never use an AI result to judge whether a specimen is safe to handle. Read the full disclaimer

Physical properties

Formation & geological history

Silica-rich groundwater filled cavities and fractures in volcanic host rock, depositing layered chalcedony followed by quartz; later oxidation produced the iron colors. The specimen’s exact geological age and locality cannot be determined from the photograph.

Uses & applications

Used as a cabochon, polishing stone, lapidary accent, or collector specimen; attractive pieces may be set in jewelry.

Geological facts

The orange-brown material is probably limonite/goethite or hematite, while the glittering patches are drusy quartz. Polishing exposes contrasting internal growth zones and mineralized fractures.

Field identification & locations

Identify by its very hard quartz-rich surface, waxy chalcedony, rounded agate banding, and sparkly quartz pockets; common sources include Brazil, Uruguay, Mexico, India, and the western United States. A locality label or hardness/streak tests would improve identification.