Mining Journal - Field Report #3127 Tri-Color Ceylon Sapphire - Exclusive Rectangular Cut
Location: Ratnapura District, Sri Lanka
Date: June 15, 2024
Prospecting Notes: Hand-selected rough from premium tri-color corundum deposits in historical Ratnapura mining concession
Specimen Documentation: Exceptional 2.12ct rough crystal exhibiting rare tri-color phenomenon with distinct violet, orange-pink color zones. Field assessment revealed vivid saturation across all three color bands with remarkable clarity throughout the crystal matrix. No visible inclusions detected under 10x field loupe examination.
Mine Site Log: Extracted from specialized tri-color bearing gravels at 5.8 meter depth within Ratnapura's legendary gem-bearing formations. Recovery from ancient alluvial deposits formed during Precambrian metamorphic processes. Surrounding matrix contained typical Sri Lankan corundum indicators including zircon, garnet, and spinel associations.
Field Collection Analysis: Raw material displayed pristine natural coloration with distinct violet terminates transitioning through intermediate zones to vibrant orange-pink base. Unheated specimen confirmed through thermal analysis indicators - completely natural tri-color distribution with no enhancement evidence. Crystal orientation optimal for rectangular cut to showcase full color spectrum.
Rough Material Processing: Exclusive rectangular brilliant cut executed with precision faceting to maximize tri-color display and optical performance. Custom cutting angles calculated to enhance color separation while maintaining structural integrity. Specialized crown and pavilion geometry employed to achieve optimal light return across all color zones. Significant material sacrifice required due to exclusive cutting protocol - 68% rough wastage necessary to preserve tri-color integrity and achieve premium optical performance.
Geological Survey Notes: Authentic Ceylon tri-color sapphire representing one of nature's rarest corundum phenomena. Color distribution follows natural crystal growth patterns consistent with unheated Sri Lankan formation processes. Vivid saturation levels exceed typical commercial grade standards. High wastage cutting justified by exceptional rarity and collector-grade finish requirements.
Site Documentation: Multi-spectral color verification completed under controlled lighting conditions. Tri-color phenomenon stable across daylight, incandescent, and LED illumination. Original rough weight: 6.63ct. Final yield: 2.12ct finished rectangular sapphire representing 32% recovery rate due to exclusive cutting methodology required to maintain complete tri-color integrity with exceptional clarity grade.
Certification Notes: Specimen qualifies for premium unheated Ceylon sapphire classification with rare tri-color designation. Recommended for elite collectors specializing in natural color phenomena. Provenance documentation complete with chain of custody from extraction to final cut.