13.90 ct Unheated Ceylon Blue Sapphire Rough Parcel – 9 Facet Grade Alluvial Pieces from Kalawana, Sri Lanka

Stone Identity & Quality

This natural Ceylon blue sapphire rough parcel has a total weight of 13.90 carats and includes 9 individual alluvial pieces, with approximate piece weights ranging from 2.07 ct to 1.15 ct. The material comes from Kalawana village around mining in Sri Lanka, a region connected to Sri Lanka’s long tradition of sapphire production. These stones are offered in their natural unheated condition and are classified as fine quality facet grade rough, suitable for professional lapidary evaluation.

This parcel is intended for buyers, gem cutters, and dealers who appreciate natural sapphire material before cutting. As with all sapphire rough, each individual piece should be examined separately for structure, clarity, color spread, and cutting direction.

Color & Visual Characteristics

The parcel shows a pleasing blue color range typical of Ceylon sapphire rough, with a fresh and natural appearance rather than an overly dark tone. Because the stones remain in rough form, the visible color may vary depending on lighting, depth, and the position of each piece. Some stones may appear more open and lighter, while others show stronger blue concentration in deeper areas.

The alluvial nature of the parcel gives the stones a softened external appearance, which is common in sapphires recovered from river gravels. This natural outer texture is part of the stone’s geological story and does not represent the final visual result after cutting.

Internal & External Features

Externally, the stones retain the rounded and slightly frosted surfaces associated with alluvial sapphire rough. Small abrasions, natural skin, and worn outer contours are expected in this type of material. These are normal characteristics for rough sapphires from Sri Lanka’s gem-bearing deposits.

Internally, each piece may show a different structure, and this is where lapidary assessment becomes important. Cutters generally study transparency, possible inclusions, internal openness, and any zoning before selecting the best orientation. Because this parcel contains multiple stones, it offers a range of structural possibilities rather than a single cutting outcome.

Cutting & Treatment Potential

This parcel is offered as natural unheated sapphire rough, which gives the buyer freedom to evaluate the stones in their current state. Some buyers prefer to preserve the natural untreated identity of Sri Lankan sapphire, while others may simply want to study the stones based on their original geological condition before making any future decisions.

From a cutting perspective, parcels like this can be useful for producing smaller finished sapphires depending on the internal quality of each piece. Potential yield will vary stone by stone, as sapphire rough must always be assessed according to depth, shape, internal features, and color placement. No treatment result should be assumed in advance, and each stone should be judged on its own gemological merits.

Source & Ethical Position

These sapphires were sourced from Kalawana village around mining in Sri Lanka, through local gem connections tied to Sri Lanka’s traditional sapphire-producing areas. At Danushka Gems & Minings, we work closely with direct miners, local traders, and source-area networks to bring natural rough gemstones to the market with clear origin transparency.

Our approach focuses on presenting stones honestly in their natural condition, so buyers can understand the material before cutting, trading, or collecting. This supports a more transparent connection between source, material, and final craftsmanship.