mineral

Likely rough feldspar crystal (possibly amazonite or orthoclase)

Potassium feldspar, KAlSi₃O₈; exact variety cannot be confirmed from the image

AI-generated identification · may be incorrect

Opaque, blocky crystal with salmon-brown and greenish areas and a dull to vitreous luster. Feldspar has Mohs hardness 6, two near-right-angle cleavage directions, and monoclinic or triclinic crystal structure depending on variety.

Identified September 26, 2026More mineral →

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At a glance

Common name: Likely rough feldspar crystal (possibly amazonite or orthoclase)
Scientific name: Potassium feldspar, KAlSi₃O₈; exact variety cannot be confirmed from the image
Category: mineral
Identified: September 26, 2026
Method: Standard

AI Estimated Value

About $2–$20 USD for a small, common rough specimen; higher value requires confirmed identity, size, and quality.

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

Crystallized from cooling, silica-rich magma, commonly in granites and pegmatites; potassium feldspar occurs in rocks spanning much of Earth’s geological history.

Uses & applications

Used in ceramics and glass; attractive, well-formed or colored crystals are collected and occasionally cut as gemstones.

Geological facts

Feldspar is the most abundant mineral group in Earth’s crust. The specimen’s color and crystal form are insufficient to identify a specific feldspar variety confidently.

Field identification & locations

Look for a blocky habit and two prominent cleavages meeting nearly at 90°; common sources include granites and pegmatites worldwide. A scratch test and fresh, clean surfaces can help distinguish feldspar from similar minerals.