Geological specimens consistent with volcanic rock or slag

This collection consists of four small, dark, irregular rock-like specimens resting on a light-colored textile. The objects exhibit diverse textures: one specimen prominently displays highly vesicular (pitted/holey) characteristics resembling scoria or industrial slag, while others show smoother, more compact surfaces with reddish-brown oxidation, consistent with iron-rich terrestrial stones. The coloring ranges from dark charcoal grey to earthy rust tones. There are no visible fusion crusts, regmaglypts (thumbprint-like indentations), or metallic gleams commonly associated with meteoritic material. The owner has provided context identifying these as 'meteor rocks,' though this claim is unverified and requires physical testing (such as magnetism, streak tests, and nickel-content analysis) for confirmation. Visually, the heavy vesiculation in some pieces is more stylistically consistent with terrestrial volcanic basalt or industrial byproduct than with most meteorite types. All specimens show rough, unpolished exteriors with varying degrees of surface weathering and accumulated dust. Without an in-person geological inspection, their exact origin remains a hypothesis.

I have examined the digital image of these four geological specimens. Based on what I can see, the pieces exhibit high vesiculation and reddish-brown oxidation. The owner identifies these as 'meteor rocks,' a hypothesis that I cannot verify from a photo. The physical characteristics—specifically the pitted, holey texture—are visually more consistent with terrestrial volcanic basalt or industrial slag than with most common meteorite types, which typically lack such extreme bubbling. If these are confirmed as common terrestrial rocks or slag, the market value is nominal, likely between $10 and $30 for the set. However, if they are hypothetical meteorites (such as rare achondrites), the value could potentially reach $2,500 or more depending on weight and classification. Because I cannot perform a magnetism test, streak test, or nickel-content analysis through a photograph, the attribution remains purely speculative. The wide value range reflects the massive discrepancy between common terrestrial stones and rare space-born material. To confirm the origin and provide a more precise valuation, an in-person geological inspection and laboratory testing are required. Without such testing, these should be valued as decorative geological curiosities. Generally, the market for unclassified 'meteor-like' rocks is weak compared to specimens with laboratory-backed provenance. If these turn out to be industrial byproducts or common scoria, the value would be at the lowest end of the provided range.