1.50 Ct. Moonstone from Madagascar

This specimen is a 1.50 carat rainbow moonstone cut into an emerald cut rectangular outline, with precise dimensions of 7.44 x 6.19 x 4.96 millimeters, and a depth ratio calculated against the average of length and width of approximately 72.8 percent, reflecting the deliberate decision to retain enough pavilion height to develop adularescent layering. The emerald cut execution follows a classical step cut architecture, featuring a broad flat table, concentric parallel crown and pavilion steps, and softly clipped corners that reduce chipping risk while preserving the rectangular geometry. The faceting schema was selected specifically to emphasize planar adularescence rather than maximize small facet brilliance, so the crown planes are shallow and contiguous, allowing internal lamellar structures within the orthoclase host to flash as coherent bands across the table and lower crown facets. The cut proportions maintain well aligned facet junctions and proportional facet sizes, providing stable orientation for the moonstone to display directional color play when rotated under variable lighting. Given the semi transparent nature of the material, the step cut also serves to modulate light transmission, balancing surface sparkle with the internal schiller that characterizes quality rainbow moonstone.

Optical character and body color are described as medium light intensity with semi transparency, producing a luminous body that supports distinct adularescent flash in cooler blue tones, with secondary green and golden sheens visible at oblique angles. The optical phenomenon is the classic adularescence caused by submicroscopic exsolution lamellae and thin layering within the feldspar matrix, and this piece exhibits a broad, even flash across the table and step facets rather than isolated pinpoint flashes, which indicates favorable internal layering orientation relative to the table plane. Clarity is graded as very slightly included at eye level, an evaluation based on unaided visual inspection under standard viewing conditions, and the inclusions are consistent with fine natural moonstone, comprising minute growth lines and thin cleavage related planes that do not interrupt the continuity of the adularescent flash. These micro inclusions are structurally typical and are in fact beneficial to the optical effect in some orientations, scattering light to enhance the schiller. There are no indications of clarity enhancement treatments or filling, and the stone is expressly offered untreated, preserving the natural internal microstructure that yields its spectral display.

Craftsmanship details extend to surface finish and overall condition, with an excellent polish on all facet planes that produces crisp reflection and minimal surface abrasion, and with facet junctions that display controlled beveling to reduce the risk of abrasion during setting. The precision of facet alignment, combined with conservative pavilion depth, supports directional light return that emphasizes the blue dominated adularescence while allowing the medium light body color to remain visible for color grading and setting considerations. Origin is Madagascar, a provenance that is associated with some of the more consistent and visually appealing rainbow moonstone material in contemporary supply chains, and this origin corroborates the internal lamellar structures observed. The absence of enhancement is a key provenance and treatment statement, assuring connoisseurs and specialist cutters that the stone can be appraised, certified, and set without ambiguity regarding treatment history. For collectors who prioritize natural optical phenomena and technical cutting integrity, this stone represents a study in balancing step cut geometry with mineral internal structure to maximize adularescent performance.

As a curated offering from The Natural Gemstone Company, this emerald cut rainbow moonstone is presented as an optimal addition to a high end gemstone collection, suitable for collectors and designers who demand technical refinement alongside natural optical interest. The combination of precise dimensions, a conservatively deep pavilion optimized for adularescence, very slightly included clarity at eye level, medium light body color, excellent polish, and untreated Madagascar provenance positions the stone for display in a collection where cutting philosophy and natural character are both valued. When evaluated for bespoke settings, the measured dimensions facilitate predictable mounting options that protect the clipped corners while showcasing the large table face for maximum adularescent viewing. For specialists assessing material for investment or inclusion in a comparative cabinet, the technical attributes detailed above provide a transparent basis for grading, comparison, and setting design, and reflect the standards of sourcing and presentation maintained by The Natural Gemstone Company.