mineral

Tumbled green feldspar or serpentine

Likely microcline feldspar (KAlSi₃O₈) or green serpentine-group mineral; exact identification requires testing

AI-generated identification · may be incorrect

Opaque blue-green to yellow-green, waxy to slightly vitreous luster, rounded by tumbling, with mottled color and possible pale feldspar veins. Estimated hardness is about 2.5–6 Mohs depending on composition; no crystal faces are visible.

Identified August 28, 2026More mineral →

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At a glance

Common name: Tumbled green feldspar or serpentine
Scientific name: Likely microcline feldspar (KAlSi₃O₈) or green serpentine-group mineral; exact identification requires testing
Category: mineral
Identified: August 28, 2026
Method: Standard

AI Estimated Value

Typically $2–$15 for a small tumbled stone; potentially $20–$100 if confirmed as attractive, natural jade-like material.

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

Green feldspar forms in potassium-rich igneous and metamorphic rocks, while serpentine forms when ultramafic mantle rocks undergo hydration; ages vary widely by locality. The specimen has been human-polished/tumbled.

Uses & applications

Used as an inexpensive decorative stone, cabochon, craft material, or collector specimen; serpentine is also used ornamentally in carvings and tiles.

Geological facts

The image alone cannot reliably distinguish green feldspar from serpentine, jade-like rocks, or dyed material. It does not show the translucency or fibrous texture typical of high-quality jadeite.

Field identification & locations

Check hardness, streak, density, and reaction to dilute acid; feldspar commonly scratches glass weakly, whereas serpentine is much softer. Common sources include India, China, Russia, Canada, and the western United States.