16.15 ct Ceylon Natural Light Blue Sapphire Crystal from Ratnapura, Sri Lanka – Unheated Natural Sapphire Specimen

Stone Identity & Quality

This is a 16.15 ct Ceylon Natural Light Blue Sapphire crystal measuring 22.5 × 10.9 × 8.1 mm. It is an unheated natural sapphire crystal sourced from Ratnapura village around mining in Sri Lanka. The stone is presented as a natural crystal/specimen rather than a confirmed facet-grade rough. Its value comes from its natural sapphire identity, crystal form, source connection, light blue color, and visible internal and external formation characteristics.

Color & Visual Characteristics

The crystal displays a light blue body color with a soft and natural tone. Under light, the body shows different visual responses depending on the angle, thickness, and internal structure. Because this is a natural crystal, the color should be evaluated across multiple directions rather than from one face only. The overall appearance is more specimen-focused, with natural beauty coming from its formation, shape, and original sapphire character.

Internal & External Features

This sapphire crystal shows natural surface marks, visible crystal faces, growth-related features, and internal characteristics. These features are expected in natural sapphire crystals and help show the stone’s geological formation. The surface and internal areas should be examined carefully if anyone considers cutting, because natural crystal marks, inclusions, and orientation can influence the final result.

Cutting, Specimen, or Treatment Potential

This stone is best described as a natural sapphire crystal/specimen. It should not be treated simply as facet-grade rough unless suitable facet-grade areas are confirmed through professional inspection. The crystal may have areas that can be studied for cutting, but any cutting decision must consider orientation, depth, inclusions, weight loss, and final face-up appearance. Since the stone is unheated, its natural condition should also be respected. Custom cutting or certification can be discussed only if suitable after proper evaluation.

Source & Ethical Position

Danushka Gems & Minings works directly with gemstone source areas in Sri Lanka, presenting natural stones with honest information and practical evaluation. Our aim is to show each gemstone clearly, including its origin, treatment status, natural features, limitations, and possible use. This source-connected approach helps collectors, gem cutters, dealers, jewelers, and international buyers understand the real identity of each stone before making a decision.