Facet Grade Ceylon Natural Unheated Purple Sapphire Rough – 10.30 ct from Bibilegama, Sri Lanka

Stone Identity & Quality

This gemstone is a Ceylon natural purple sapphire rough weighing 10.30 ct and measuring 14.2 × 10.4 × 8.3 mm. It is described as unheated and facet grade, making it suitable for lapidary evaluation and custom cutting consideration. The stone was sourced from Bibilegama village around mining in Sri Lanka, a source-connected gem area linked to Sri Lanka’s long gemstone tradition.

Color & Visual Characteristics

The rough shows a purple body color with a visible shift toward pink under different lighting conditions, especially under incandescent and fluorescent light. This should be understood as a natural visual color response under changing light, not an overclaimed treatment result. In rough sapphire, color can appear different depending on thickness, surface texture, viewing angle, and light direction. Proper cutting orientation can help reveal the best face-up color.

Internal & External Features

Externally, the stone shows natural rough surface texture, small surface marks, and uneven areas commonly considered during pre-forming. Internally, the material should be studied carefully under strong light before cutting. Depth, transparency, possible inclusions, color direction, and zoning behavior will all influence the final cutting decision. These features are important because rough sapphire cannot be judged only by one photo or one viewing angle.

Cutting & Treatment Potential

This stone is described as unheated, so its value and interest come from its natural condition and cutting potential. The rough has size and depth suitable for evaluation, but the final shape and yield depend on the cutter’s planning. Possible cutting directions may be considered based on the best color concentration, clarity window, and weight retention. No final result should be overclaimed before cutting, because natural sapphire rough always requires proper inspection and orientation.

Source & Ethical Position

This sapphire was sourced from Bibilegama village around mining in Sri Lanka through Danushka Gems & Minings’ source-connected gemstone work. Our process focuses on honest rough evaluation, origin transparency, and practical communication with gem cutters, dealers, and collectors. Each rough stone is presented with realistic information so buyers can understand both the beauty and the technical decisions involved before cutting.