Netopen Raw Diamond Rough Crystal Specimen 3.0ct — Natural Grey

The Netopen Natural Grey Raw Diamond Rough Crystal Specimen at 3.0 carats occupies a specific position in the rough diamond collector market that the conventional faceted gem trade rarely showcases: the natural grey color category, where the diamond’s characteristic grey tone arises from a combination of submicroscopic graphite platelet inclusions and hydrogen-related defect clusters distributed through the crystal lattice in concentrations that produce visible absorption across the visible spectrum without the selective wavelength absorption that creates more saturated fancy colors. This grey coloring is entirely of natural geological origin — confirmed by Netopen’s gemological assessment — and distinguishes this specimen from irradiation-treated or coated alternatives that sometimes enter the rough stone market without clear disclosure. At 3.0 carats, this specimen represents a meaningful size for a rough diamond specimen that is larger than the majority of rough diamonds recovered from primary kimberlite sources globally, where the average commercial rough recovered is typically under one carat. The crystal habit shows the stepped growth pattern characteristic of rough diamonds that have experienced irregular growth rate variation through their formation history, creating a layered step-face appearance on the primary crystal surfaces that is visually striking and scientifically informative. The surface luster is the characteristic adamantine luster of unpolished diamond — the highest refractive index of any natural mineral producing the intense light-interaction behavior even on uncut surfaces. Dimensions approximately 8.2mm x 7.8mm x 7.4mm. Individual weight verified on calibrated gemological balance to ±0.01 carat. Full provenance trail from extraction source through Netopen’s supply chain documented and included. Netopen rigid presentation box, velvet insert, gemological certificate, provenance document, and professional 10x loupe included.