Herkimer Diamond Appraisal

Raw Herkimer Diamond Quartz Crystal Cluster

This is a natural mineral specimen featuring clear to translucent quartz crystals, commonly known as Herkimer Diamonds when found in this double-terminated habit. The specimen is held in a person's hand, suggesting an approximate size of 3 to 4 inches in width. It consists of multiple faceted crystals embedded within a rough, iron-stained host rock (matrix). The primary crystal visible in the center exhibits high clarity, distinct geometric facets, and a glassy (vitreous) luster typical of high-quality quartz. The surrounding matrix is a coarse, sedimentary rock with a varying palette of tan, ochre, and rust-brown tones, indicating the presence of iron oxide or limonite staining. Construction-wise, this is a geological formation where the quartz grew into cavities within the limestone or dolostone bedrock. Notable features include the naturally sharp terminations of the crystals and the contrast between the crystalline structures and the dull, opaque matrix. The condition appears to be excellent for a raw specimen; while some natural fractures and milky inclusions are visible within the crystals, there are no apparent signs of lab-grown enhancement or artificial polishing. The quality of the central crystal is notably high due to its transparency and well-defined faces. This piece has no maker’s marks, as it is a naturally occurring mineral. It is a classic example of North American mineralogy, most likely originating from Herkimer County, New York.