Facet Grade Unheated Ceylon Blue Sapphire Rough – 5.00 ct from Rambuka, Sri Lanka

Stone Identity & Quality

This is a 5.00 carat Facet Grade Ceylon Natural Blue Sapphire Rough measuring 10.6 × 9.1 × 7.1 mm. The stone is sourced from Rambuka village around mining in Sri Lanka and remains in its natural unheated condition. As a facet grade rough sapphire, it is suitable for buyers seeking natural Sri Lankan blue sapphire material for custom cutting, collection, or trade. Its size, body color, and overall form make it a strong piece for professional evaluation and planning.

Color & Visual Characteristics

The sapphire shows a deep to medium-rich blue color character in rough form, with visible natural variation depending on lighting and viewing angle. Like many natural sapphire rough stones, the final face-up appearance after cutting cannot be guaranteed in advance, but the present material shows attractive blue color concentration and a visually strong rough body. The stone has a substantial face and useful depth, which can be beneficial when studying the best orientation for color and light return.

Internal & External Features

This rough sapphire displays natural external surface marks and rough features that are normal for untreated sapphire material. Internally, the stone appears promising for cutting study. In visual observation, the wider face presents an eye-clean appearance, while the smaller face also appears clean, though full cutting decisions should always depend on direct examination during preforming and orientation. These characteristics make it a practical candidate for buyers who want a natural rough stone with a good balance between appearance and cutting possibility.

Cutting & Treatment Potential

As a facet grade blue sapphire rough, this stone has strong potential for custom cutting. Its measurements and natural form provide a useful starting point for planning shape, orientation, and yield. Possible final outcomes may include cushion, oval, or another custom faceted design depending on the cutter’s judgment. The stone is currently natural and unheated. No treatment result or final faceted appearance should be overclaimed, but as a quality Ceylon sapphire rough, it is a suitable piece for professional cutting analysis and transformation.

Source & Ethical Position

This sapphire comes from Rambuka village around mining in Sri Lanka, one of the island’s recognized gem-producing source areas. Danushka Gems & Minings focuses on source-connected rough gemstones, giving buyers access to natural materials with transparent origin and practical cutting potential. This direct rough-to-market connection is valuable for gem cutters, dealers, and gemstone buyers who want natural Ceylon sapphire from a reliable source background.