metamorphic

Likely golden mica-bearing metamorphic rock

Micaceous schist, possibly biotite schist; composition commonly quartz + feldspar + biotite/phlogopite mica

AI-generated identification · may be incorrect

Coarse, foliated texture with glittering bronze-gold flakes and gray translucent grains; mica has Mohs hardness 2–3, quartz about 7. Pearly to vitreous luster, platy cleavage, and variable specific gravity around 2.7–3.1.

Identified September 6, 2026More metamorphic →

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At a glance

Common name: Likely golden mica-bearing metamorphic rock
Scientific name: Micaceous schist, possibly biotite schist; composition commonly quartz + feldspar + biotite/phlogopite mica
Category: metamorphic
Identified: September 6, 2026
Method: Standard

AI Estimated Value

About $5–$30 for a common hand specimen; $30–$100 if unusually attractive, large, or confirmed to contain collectible mica or associated minerals.

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

Formed when shale or other clay-rich sediment was subjected to regional heat and pressure, realigning mica into foliation; typically produced during mountain-building, often Paleozoic to Precambrian in age.

Uses & applications

Used mainly as a decorative or educational specimen; schist may be used locally as crushed aggregate or dimension stone, while mica has industrial uses in insulation, fillers, and cosmetics.

Geological facts

The vivid gold color is likely iron-rich biotite or phlogopite rather than gold; metallic-looking flakes can be mistaken for precious metal.

Field identification & locations

Identify it by visible planar mica layers, easy splitting along foliation, and sparkly flakes rather than cubic gold crystals. Common in metamorphic belts worldwide, including the Appalachians, Alps, and Scandinavian mountains.