11.15 ct Ceylon Natural Unheated Blue Sapphire Rough from Rambuka, Sri Lanka – Two-Phase Liquid-Vapor Inclusion Enhydro-Type Sapphire

Stone Identity & Quality

This is an 11.15 ct Ceylon Natural Unheated Blue Sapphire rough measuring 11.3 × 10.9 × 8.9 mm. The stone was sourced directly by Danushka Gems & Minings from Rambuka village around mining in Sri Lanka. It is presented as natural unheated blue sapphire rough with special gemological and collector interest due to the visible two-phase liquid-vapor fluid inclusion inside the stone. The value of this piece is not only in its sapphire identity, but also in the natural internal formation that can be observed inside the rough.

Color & Visual Characteristics

The stone shows blue sapphire body color with light movement visible through the rough body. The internal cavity and liquid-vapor inclusion can be observed under close magnification and strong light. Because the main attraction of this piece is the moving gas bubble inside liquid, the stone should be appreciated both as Ceylon blue sapphire rough and as a gemological specimen. The visual effect depends on lighting, angle, magnification, and how the internal cavity is viewed.

Internal & External Features

The most important internal feature is the visible two-phase liquid-vapor fluid inclusion. A mobile gas bubble can be seen moving inside liquid within a natural cavity. According to the current zoomed view, no clear solid inclusion is visible in the cavity. In market language, this may be called an enhydro-type sapphire, but the accurate gemological description is a two-phase fluid inclusion with a moving gas bubble. Such liquid-vapor inclusions are meaningful because they preserve information from the geological formation environment of the sapphire. Well-preserved two-phase inclusions are also valued because strong heat treatment can damage, alter, or rupture delicate fluid pockets, sometimes leaving stress-related features.

Cutting, Specimen, or Treatment Potential

This sapphire should be handled carefully because its special value is not only as rough material, but also as a gemological and collector specimen. Cutting may remove, damage, or reduce the visibility of the two-phase fluid inclusion, so the stone should not be treated like ordinary cutting rough without proper study. If cutting is considered, the position of the inclusion, depth, orientation, and risk must be evaluated first. For many collectors and gemology-focused buyers, keeping the stone in rough/specimen form may preserve more of its natural formation value. The stone is offered with direct-source unheated guarantee from Danushka Gems & Minings because it was sourced directly from Rambuka mining, not purchased as an unknown market stone.

Source & Ethical Position

Danushka Gems & Minings sourced this sapphire directly from Rambuka village around mining in Sri Lanka. Because the stone came directly from the mining source, its origin and unheated status are presented with direct-source confidence. Our approach is to show natural gemstones honestly, including their origin, natural features, internal characteristics, and practical limitations. This sapphire is presented as a special Ceylon blue sapphire rough with visible two-phase inclusion activity, clear Rambuka source connection, and collector-level gemological interest.