On eBay Now...Pre-1400 Indo/Tibetan Old Agate 9 Eye Motif Dzi Bead 50*18*13mm 17.1 Grams For Sale
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Pre-1400 Indo/Tibetan Old Agate 9 Eye Motif Dzi Bead 50*18*13mm 17.1 Grams :
$450.00
2. Forensic Evidence PortfolioA. Physical Specifications & Material DensityDimensions: 50mm × 18mm × 13mm (Elongated barrel morphology).Mass: 17.9 grams.Calculated Density: ~2.92 g/cm³.Gemological Significance: The density sits slightly above pure, clear chalcedony (2.58–2.64 g/cm³). This confirms a highly concentrated silicate matrix heavily saturated with dense, native iron and manganese impurities, directly accounting for the deep opaque coloration and natural mineral behavior.B. Perforation Architecture & Drilling TechnologyInternal Channel Morphology: The internal bore hole cleanly tapers to a smaller diameter near the center of the bead.Lapidary Diagnostic: This reveals a classic biconical drill hole, indicating double-ended manual drilling work. The alignment confirms that the stone was bored halfway through from each tip using traditional hand-driven tools and abrasives, leaving a characteristic inner constriction point where the two drill paths met. This structure cleanly rules out the uniform, straight cylindrical bores produced by high-speed modern factory diamond drills.Perforation Profiling: The drill hole exits exhibit a naturally rounded, oval-beveled wear pattern resulting from prolonged historical friction against traditional cordage material.C. Microscopic & Light-Blocking Mineral InclusionsLight-Blocking Cinnabar Blooms: The bead exhibits large, dense, consolidated cinnabar blooms that completely block light under concentrated transillumination. While the surrounding milky chalcedony allows a warm orange-yellow glow to pass through, these internal iron oxide (hematite/goethite) clusters form solid crystalline blockages. Their irregular, bleeding boundary layers disrupt and seep through the white alkaline etched lines, proving the mineral crystallization and migration occurred naturally over centuries following the bead's decoration.Dragon Skin Crazing: Widespread network of microscopic, multi-directional V-shaped weathering fissures. The micro-fractures display a worn, smoothed perimeter consistent with historical surface stabilization rather than sharp, modern thermal-shock replica texturing.Surface Texture: Clear micro-pitting (an "orange-peel" texture) across the dark segments, matching natural surface micro-erosion.D. Optical & UV Spectral ResponseTransmission Glow: Direct backlighting yields a signature yellow-to-orange milky translucent glow across the body, proving a natural agate crystal lattice and validating deep alkaline substrate saturation.Ultraviolet (UV) Fluorescence: Under standard blacklight exposure, the white lines throw back a muted, light purple reflection of the alkaline compound, while the dark brown zones yield a deep, absorbative dark purple response. The absolute absence of bright neon yellow, green, or chalky white fluorescence rules out the presence of modern stabilizing resins, epoxies, or synthetic surface repairs.E. Tactile & Acoustic ResonanceTactile Profile: Noticeably heavy with high thermal conductivity (cold to the initial touch), transitioning into a slick, "greasy" waxy surface texture indicative of long-term organic skin-oil (patina) absorption.Acoustic Resonance: Striking the talisman yields a crisp, high-pitched metallic clinking sound, confirming an entirely intact internal crystalline structure free of deep internal structural deadening faults.
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