Netopen Raw Diamond Rough Crystal Specimen 1.9ct — Natural White Frosted Surface

The Netopen Natural White Raw Diamond Rough Crystal Specimen at 1.9 carats with frosted alluvial surface texture presents a specific and historically significant rough diamond character — the frosted, matte-surfaced appearance that develops on diamond crystals that have been transported by river systems from their primary kimberlite source and subjected to the combined mechanical and chemical weathering of extended alluvial transport. Alluvial diamond deposits — river and coastal beach placer concentrations where diamonds have been liberated from eroded kimberlite pipes and concentrated by fluvial sorting processes — have been among the most historically significant diamond sources in the world: the diamonds of the Golconda region of India that supplied the world’s entire known diamond supply until the 18th century were predominantly alluvial, as were the Brazilian deposits that followed and the significant West African coastal deposits that remain important today. The frosted surface of an alluvial diamond rough specimen is the physical record of that transportation history — the micro-scale surface chemical dissolution and mechanical abrasion that progressively modifies the sharp natural crystal faces of primary kimberlite rough into the rounded, frosted form that is immediately recognizable to dealers and collectors familiar with alluvial rough diamond supply. This surface character creates a visual warmth and tactile quality that many collectors prefer to the sharper-edged, more reflective character of primary kimberlite rough — the frosted surface scatters light rather than reflecting it in concentrated glints, giving the specimen a more approachable, organic appearance. The internal diamond body remains unaffected by the surface modification — near-colorless, transparent, and of good clarity for a rough of this size. Dimensions approximately 6.4mm x 6.0mm x 5.7mm. Alluvial origin documentation, geological significance of frosted surface feature explained, conflict-free provenance, and standard gemological certificate supplied in Netopen presentation box.