mineral

Polished blue-green glassy slag or coated mineral fragment

Most likely man-made colored glass/slag; exact composition cannot be determined visually

AI-generated identification · may be incorrect

Vivid cobalt-blue to green body, glassy luster, irregular conchoidal-looking fracture, metallic/brassy patches, and possible surface coating. Mohs hardness is approximately 5–6 if glassy; no reliable cleavage or crystal structure is visible.

Identified August 11, 2026More mineral →

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At a glance

Common name: Polished blue-green glassy slag or coated mineral fragment
Scientific name: Most likely man-made colored glass/slag; exact composition cannot be determined visually
Category: mineral
Identified: August 11, 2026
Method: Standard

AI Estimated Value

Typically $1–$10 as slag or decorative glass; perhaps $10–$30 if unusually attractive and marketed as a collectible 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

The unusually saturated color, flowing internal color zones, and metallic inclusions strongly suggest industrial glass or copper-bearing smelting slag rather than a natural mineral. It may be tumbled or naturally abraded; geological age is therefore not applicable or may be recent.

Uses & applications

If slag or glass, it has little industrial or gemstone value, though attractive pieces are collected as curiosities or used decoratively. It should not be treated as turquoise, azurite, or opal without testing.

Geological facts

Natural blue-green minerals can resemble this, but the apparent glassy texture and metallic inclusions are diagnostic concerns. A streak test, hardness test, and examination for bubbles would help distinguish glass/slag from natural stone.

Field identification & locations

Near 25.5°N, 55.7°E, construction debris and industrial slag are more plausible than rare natural blue gemstones. Test on an inconspicuous edge: glass gives a white streak, lacks cleavage, may show bubbles, and scratches ordinary window glass only weakly; avoid acid or destructive tests.