Metallic Mineral Specimen (appears to be Pyrite)

This small mineral specimen, held between human fingers for scale, appears to be a small cluster of metallic crystals approximately 1 to 1.5 centimeters in length. The specimen exhibits a distinct brassy-yellow or pale gold-toned metallic luster, stylistically consistent with common iron sulfide minerals such as pyrite (often referred to as 'fool's gold'). The surface is comprised of a dense aggregate of small, unevenly distributed cubic or pyritohedron crystal structures that reflect light at varying angles, creating a sparkling effect. Its shape is irregular and somewhat nodular, with a rough, granular texture visible throughout. There are no visible manufacturer marks, labels, or identifying stamps on the piece, which is typical for a raw geological sample. The coloration is generally uniform, though small areas show slightly darker tarnish or shadowing between the tight crystal clusters. Physical verification of its hardness, streak, and density would be required to differentiate it definitively from other minerals like chalcopyrite or marcasite. The identification as likely pyrite is based on its classic 'fools gold' visual appearance and common availability in this size and form.

I have examined the image provided of the small metallic mineral specimen. Based on what I can see, the sample exhibits characteristics commonly associated with the mineral pyrite, specifically a brassy-yellow metallic luster and a cubic crystal structure. However, I cannot verify the mineral's identity from a photo alone; physical testing such as a streak test, hardness test, and density measurement would be required to rule out similar-looking minerals like chalcopyrite or marcasite. I am proceeding under the hypothesis that this is a natural pyrite cluster. For a specimen of this small size (approximately 1-1.5 cm) and common geological occurrence, the value is primarily determined by its aesthetic appeal and the integrity of its crystal faces. I can't determine the exact weight or the presence of any internal fractures through an image. In the general market for bulk minerals and geological samples, items of this type are widely available and typically sell in the low double-digit range. The value provided assumes a natural specimen; should the item be an artificial formation or a synthetic replica, it would have negligible market value, likely under $1.00. High-quality mineral specimens generally see stable demand from hobbyists and educators, but this specific size and quality do not command a premium. To establish a more precise value or confirm the geological identity, in-person scientific testing or a physical inspection by a mineralogist would be necessary.