4.81 Ct. Cabochon Moonstone from Madagascar

This pear shape blue flash moonstone weighs 4.81 carats, with dimensions 11.69 by 8.77 by 6.52 mm, cut as a classic cabochon to maximize adularescence. The domed profile is proportioned to concentrate the blue schiller toward the apex, the dome height of 6.52 mm producing a pronounced play of light when oriented perpendicular to the observer, the pear geometry introducing a directional adularescent eye that can be centered over a setting point. Cutters oriented the internal lamellar layers parallel to the base, a technique that enhances the characteristic moonstone silk and delivers a clean, continuous blue flash rather than fragmented spectral spots. The material is translucent, with medium light color intensity, and exhibits an excellent polish across the dome and girdle, the surface finishing executed to minimize facet and tool marks and to preserve the integrity of the adularescence. Clarity is graded as very very slightly included evaluated at eye level, inclusions confined to fine, parallel striations consistent with albite intergrowths, these inclusions do not detract from the visual field or the focused blue flash. No enhancement has been performed on this piece, the bodytone and adularescence are entirely natural, and the origin is Madagascar, a source known for producing moonstones with strong blue sheen and stable lamellar structure.

From a gemological perspective, the specimen demonstrates textbook feldspar behavior, the adularescence arising from light interference within alternating orthoclase and albite layers, and the polish and cabochon symmetry reflect precision lapidary technique aimed at optimizing that effect. The weight and dimensions place this stone in a category ideal for a statement pendant or a refined solitaire ring setting where the pear outline can be oriented to emphasize the flash during movement, settings that present the dome to incident light will reveal the full range of blue flash. For cataloging purposes, Opal type White Opal is included as an inventory classification, acknowledging the similar light driven optical interest collectors seek, while the material itself remains a blue flash moonstone. The Natural Gemstone Company certifies the details above, including the no enhancement statement and Madagascar origin, and can provide additional viewing angles and mounting recommendations to ensure the selected setting complements the stone geometry and adularescent behavior.