1.90 Ct. Moonstone from Madagascar

This is a transparent rainbow moonstone from Madagascar, weighing 1.90 carat, with a cushion shape and exact dimensions of 8.31 x 6.86 x 5.55 mm. The stone is precision cut in a mixed brilliant style to balance table facing reflection and internal flash, and it carries a clarity grade of slightly included when evaluated at eye level. Color intensity is described as light, and the gem has an excellent polish. No enhancement has been applied, and the natural provenance is documented as Madagascar. The combination of transparency and mixed brilliant cutting allows for a measured interplay between adularescence and faceted scintillation, a characteristic that distinguishes high quality faceted rainbow moonstone specimens.

In comparison to other members of the plagioclase feldspar family, this Madagascar rainbow moonstone presents a refined and directional sheen that differs from both traditional cabochon moonstones and more strongly labradorescent material. Versus classic adularescent moonstones presented as cabochons, which emphasize a soft, diffuse moonlike glow, the faceted mixed brilliant cut on this stone translates its adularescence into more pinpoint flashes and a subtle internal scintillation that responds to movement and changing light angles. Compared to labradorite and spectrolite, which often show broad, vivid, angular flashes of blue and multicolored labradorescence, this rainbow moonstone exhibits a gentler spectrum with less abrupt color shifts, favoring an ethereal layered sheen over bold, plate like flashes. Relative to colorless transparent gemstones in the trade such as quartz, which rely primarily on clarity and faceting for reflectivity, this rainbow moonstone offers an optical effect rooted in internal structural interference rather than simply surface reflection or dispersion. It is less brilliant and dispersive than high refractive index gems such as diamond, but it provides a unique hybrid of adularescent sheen and faceted brilliance that is distinct within the moonstone category. The Natural Gemstone Company presents this piece for clients seeking a transparent, lightly colored rainbow moonstone with controlled adularescence, clean presentation, and documented natural origin.