mineral
Pale green mineral specimen, likely serpentine or chrysoprase
Tentatively serpentine-group mineral (Mg₃Si₂O₅(OH)₄); chrysoprase is an alternative identification (microcrystalline quartz, SiO₂)
AI-generated identification · may be incorrectSmall pale green, opaque-to-translucent rough fragment with a dull to waxy luster; apparent hardness is likely ~2.5–4 for serpentine or ~6.5–7 for chrysoprase. Crystal structure cannot be determined reliably from this blurred image, and no cleavage is visible.
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Physical properties
Small pale green, opaque-to-translucent rough fragment with a dull to waxy luster; apparent hardness is likely ~2.5–4 for serpentine or ~6.5–7 for chrysoprase. Crystal structure cannot be determined reliably from this blurred image, and no cleavage is visible.
Formation & geological history
Serpentine forms when ultramafic rocks undergo hydration during metamorphism; chrysoprase forms when nickel-bearing silica-rich fluids alter rocks. Both are geologically common and may range from Precambrian to recent settings.
Uses & applications
Serpentine is used as an ornamental stone and carving material; chrysoprase is used in cabochons and jewelry. A fragment this small has little commercial value unless confirmed as gem-quality chrysoprase.
Geological facts
The pale green color alone is insufficient for confident identification; hardness and streak tests are useful. Serpentine commonly feels smooth or soapy, whereas chrysoprase scratches glass.
Field identification & locations
Common serpentine localities include California, Italy, New Zealand, and Canada; chrysoprase is notable from Australia, Poland, and Brazil. Test discreetly with a steel blade and glass, and avoid destructive testing if collectible.
