metamorphic

Pale greenish quartz-bearing rock, possibly serpentine or altered feldspar

Tentatively serpentinite-related rock (serpentine-group minerals) or altered granitic material; identification is uncertain from the photograph

AI-generated identification · may be incorrect

Small angular fragment with pale green, cream, and yellow coloration, dull-to-waxy luster, and apparent granular/crystalline texture. Likely hardness about 3–7 depending on composition; no clear cleavage or crystal faces are visible.

Identified September 15, 2026More metamorphic →

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At a glance

Common name: Pale greenish quartz-bearing rock, possibly serpentine or altered feldspar
Scientific name: Tentatively serpentinite-related rock (serpentine-group minerals) or altered granitic material; identification is uncertain from the photograph
Category: metamorphic
Identified: September 15, 2026
Method: Standard

AI Estimated Value

$0–$1 rough/common; approximately $5–$20 as a polished decorative specimen

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

Possible hydrothermal or metamorphic alteration of ultramafic rock, or weathering of feldspar-rich igneous rock. The Guerrero region near 16.9°N, 99.8°W contains diverse igneous and metamorphic rocks, so a local altered rock is plausible.

Uses & applications

As an unverified fragment it has little commercial value; attractive polished pieces of serpentine or quartz-bearing rock may be used decoratively or as inexpensive lapidary material.

Geological facts

The reported slight internal sparkle is consistent with tiny quartz, feldspar, mica, or serpentine surfaces. A firm identification requires hardness, streak, acid, and ideally magnification tests.

Field identification & locations

Likely worth under $1 as a common local specimen, or roughly $5–$20 if polished and attractive. Test whether it scratches glass (quartz-rich material), whether a steel nail scratches it, and whether pale powder forms on unglazed ceramic; avoid assuming it is jade without laboratory testing.