5.81 ct Ceylon Natural Unheated Blue Sapphire Rough Pair from Bibilegama, Sri Lanka – Facet Grade Alluvial Rough with Color Zoning

Stone Identity & Quality

This is a two-piece Ceylon Natural Unheated Blue Sapphire Rough Pair with a total weight of 5.81 ct. The first stone weighs 2.80 ct and measures 9 × 7.7 × 4.7 mm, showing a strong blue body color. The second stone weighs 3.01 ct and measures 10.3 × 7 × 5.4 mm, with a natural triangle-shaped rough form. Both stones are sourced from Bibilegama village around mining in Sri Lanka and presented as facet-grade alluvial sapphire rough.

Color & Visual Characteristics

The parcel shows blue sapphire body color with visible color zoning. The 2.80 ct piece presents a stronger blue appearance, while the 3.01 ct triangle-shaped piece shows a natural mix of blue tones and zoning through the rough body. In sapphire rough, color may appear different depending on lighting, thickness, viewing angle, and orientation. The final face-up color after cutting should be judged only after careful planning and preforming.

Internal & External Features

Both stones show natural alluvial surface features, including rounded areas, surface marks, and natural rough texture. The visible color zoning and internal structure make these stones useful for cutting study, but the cutter must check the material carefully before deciding the final shape. The rough surface and internal features are normal for natural unheated sapphire rough and should be considered during orientation and yield planning.

Cutting, Specimen, or Treatment Potential

As facet-grade rough, these stones can be studied for custom cutting. The 2.80 ct strong blue piece may offer a compact cutting direction, while the 3.01 ct triangle-shaped rough may require more careful orientation due to its shape and zoning. Possible final designs depend on depth, clean areas, color placement, and surface removal. No final yield, finished shape, or face-up color should be promised before professional cutting evaluation. Custom cutting and certification can be arranged if suitable.

Source & Ethical Position

Danushka Gems & Minings works directly with gemstone source areas in Sri Lanka, focusing on honest presentation, practical evaluation, and transparent origin details. This rough pair from Bibilegama village around mining in Sri Lanka represents our source-connected approach: natural stones are studied carefully, described realistically, and offered with clear information for gem cutters, dealers, collectors, and buyers who understand rough-to-finished gemstone potential.