Natural Moonstone Rough · 13.485 ct · Medium Facet Quality

This individually documented natural Moonstone rough weighs 13.485 carats and is presented as a mixed-quality lapidary specimen with both facet-quality and cabochon-quality zones. The material shows a combination of clearer transparent areas and milkier internal sections, giving the cutter different possibilities depending on orientation and final design.

Measuring approximately 20.6 × 12.1 × 10.3 mm, the specimen has sufficient size and depth to allow careful evaluation of transparency, internal structure, usable yield and the position of its optical effect.

Approximately half of the material presents a clearer appearance suitable for consideration as medium facet-quality rough, while the milkier portion is more naturally suited to cabochon cutting, where body texture and adularescence can remain visually important. This variation gives the specimen an interesting dual cutting potential rather than limiting it to a single lapidary approach.

A defining characteristic of this Moonstone is its slight blue adularescence. This characteristic feldspar phenomenon appears as a subtle floating bluish sheen and can shift in position and intensity as the rough is moved under changing light.

Careful orientation is particularly important when working with this material. The cutter must consider the transition between clear and milky zones together with natural inclusions, internal structure, possible fissures and the direction of the adularescent effect. Depending on the chosen orientation, the rough may yield a faceted gemstone, a cabochon, or potentially a combination of smaller finished stones.

This specimen is identified as Natural Orthoclase / Moonstone and is recorded with no indications of heating and no indications of other treatment. Its colour, internal structure and optical character are therefore presented in their naturally documented state.

Moonstone belongs to the feldspar group and is valued for the internal structural conditions that produce adularescence. In rough material, this effect may appear irregularly distributed and can become stronger or weaker depending on cutting direction and final surface orientation.

As a natural rough gemstone, this specimen may contain inclusions, lamellar growth structures, internal fissures, cleavage-related features and surface irregularities. These characteristics form part of the geological history of the material and should be assessed carefully during cutting and yield planning.

With its 13.485 ct weight, mixed clear-to-milky internal character and subtle blue adularescence, this natural Moonstone rough offers flexible lapidary potential. Its combination of facet-quality and cabochon-quality material allows the cutter to plan the final result around transparency, optical effect, internal structure and material retention.