Netopen Raw Diamond Rough Crystal Specimen 3.5ct — Natural White Tetrahedral

The Netopen Natural White Raw Diamond Rough Crystal Specimen at 3.5 carats in tetrahedral habit presents one of the structurally rarest natural crystal forms in the diamond collection — the tetrahedron, a four-faced pyramid with triangular faces that represents the trigonal trapezohedral form of diamond crystal growth that develops under specific mantle growth conditions distinct from the more common octahedral environment. While the octahedron with its eight faces is by far the most commonly encountered natural diamond crystal habit, the tetrahedron with four faces is statistically less common in recovered rough and more immediately visually distinctive when encountered — presenting as a sharp, single-pointed pyramid rather than the double-pyramid bipyramidal form of the octahedron. The geological conditions that favor tetrahedral over octahedral diamond growth are associated with specific mantle fluid compositions and growth rate profiles that Netopen’s geological consultants have documented in the accompanying scientific reference material included with this specimen. The crystal surfaces of a natural tetrahedron show the same trigon etch pits as octahedral faces — confirming the crystallographic relationship between the two habits — but oriented in a reversed sense relative to the face symmetry, a detail visible under 10x magnification that experienced collectors and gemologists use to confirm the tetrahedral nature of ambiguous specimens. Surface luster is natural adamantine with minor frosting at the apex from geological abrasion during kimberlite transport. Near-colorless body color with excellent transparency for a 3.5ct rough specimen of this habit. Dimensions approximately 8.8mm x 8.5mm x 7.9mm. Supplied in Netopen presentation box with gemological certificate, tetrahedral habit documentation, geological significance reference material, conflict-free provenance, and professional 10x loupe.