0.31 Ct. Moonstone from Ceylon (Sri Lanka)

This listing describes a single, transparent rainbow moonstone, precisely weighed at 0.31 carat, a weight that positions this gem within a refined spectrum of wearable quality, suitable for fine jewelry applications. The stone is fashioned in an emerald cut shape, with exact dimensions of 5.45 x 3.42 x 2.58 mm, offering an elegant rectangular profile and crisp step facets. Originating from Ceylon, Sri Lanka, this specimen reflects the geological provenance associated with well formed moonstones, and its clarity and polish speak to careful selection and skilled lapidary work. The combination of a 0.31 carat weight and the emerald cut is intentional, yielding a balanced presentation that emphasizes the stone’s transparency and internal luster, rather than relying on size alone. This gem is presented by The Natural Gemstone Company, and it exemplifies our attention to proportion and optical performance in small to medium sized gemstones.

The emerald cut enhances the gem’s visual calm and structural symmetry, with linear facets that create broad planes of light and shadow, accentuating the internal sheen unique to rainbow moonstone. The cut’s elongated geometry, combined with the stated dimensions, produces a satisfying table face and balanced depth, preserving light return and visual stability when set. The excellent polish ensures that facet junctions are clean and reflective, supporting a precise appearance under loupe and in hand. Despite its modest carat weight, the 0.31 carat emerald cut presents as a premium component for a variety of fine jewelry designs, including solitaire pendants, elegant rings, and refined earrings, where cut quality and surface finish are paramount to overall value.

Clarity is graded as very slightly included, evaluated at eye level, a designation that indicates minor internal characteristics that do not materially detract from the gem’s appearance at normal viewing distances. These light inclusions are typical in natural moonstone and often contribute to the stone’s character without compromising transparency. The gem displays a light color intensity, which in rainbow moonstone allows subtle spectral flashes to manifest without overpowering the gem’s inherent translucence. There is no enhancement, confirming that the material is natural and untreated, a factor that supports long term stability and predictable care. Collectively, the clarity grade, natural state, and skilled finishing reinforce the stone’s premium positioning in its weight class.

From a practical perspective, the dimensions and carat weight translate into a stone that is comfortable for daily wear when set properly and protected by good mounting design. The emerald cut’s corners and step facets call for a setting that secures the stone while allowing light to interact with the table and pavilion planes, maximizing the moonstone’s adularescent qualities. Given the 0.31 carat weight and the 5.45 x 3.42 x 2.58 mm proportions, the gem pairs well with narrow to medium shanks in ring settings, delicate prong or bezel settings in pendants, and coordinated matched pairs for earrings where symmetry is important. The excellent polish supports minimal maintenance, requiring only occasional gentle cleaning to preserve surface luster.

The Natural Gemstone Company provides this 0.31 carat, transparent emerald cut rainbow moonstone as a specimen that combines calibrated dimensions, careful cutting, transparent body, and a clarity grade of very slightly included evaluated at eye level, all originating from Ceylon Sri Lanka, with no enhancement. The overall presentation prioritizes optical integrity and stable, natural material characteristics, suitable for clients who seek fine gem quality in a modest carat weight. This moonstone represents a premium choice within its size category, offering a measured and enduring aesthetic for considered jewelry design and long term enjoyment.