1.92 Ct. Moonstone from Madagascar

This listing describes a single, semi transparent rainbow moonstone weighing 1.92 carats, presented in an asscher octagon shape with precise dimensions of 6.86 by 6.83 by 6.71 millimeters, an asscher cut, a clarity grade of very slightly included evaluated at eye level, medium light color intensity, and an excellent polish. There has been no enhancement to the stone, and its origin is Madagascar. The asscher octagon form combines the strong geometric lines of a classic asscher with a slightly softened octagonal outline, offering symmetry and a dramatic face up presentation that complements the moonstone family of optical effects. At 1.92 carats this specimen sits in a size range that is rare for clean, well cut rainbow moonstone pieces, providing both visual impact and versatility for high quality bespoke jewelry work.

From a gemological perspective the internal structure of this moonstone is what gives it a sparkle and play of color that is distinct from many other gem species. Moonstone belongs to the feldspar group, and the adularescence commonly associated with moonstone is produced by microscopic, alternating layers of different feldspar minerals, typically orthoclase and albite. When light enters the stone it is scattered and diffracted by these lamellar structures, producing a soft billowing glow or a more articulated flash when oriented and faceted correctly. In rainbow moonstone the interaction of transmitted and reflected light with minute inclusions and thin film like structures can separate white light into spectral colors, yielding blue flashes and broader spectral iridescence. The semi transparent body of this piece allows for both internal transmission and surface reflections, which when combined with the asscher cut step facets create repeated internal mirrors and flashes. The step facets of the asscher cut direct light back and forth across the lamellar layers, intensifying adularescence and creating a scintillation pattern that appears to move as the stone or the light source is shifted.

Clarity and polish play an essential role in the perceived brilliance of feldspar gemstones, and the very slightly included clarity grade of this moonstone is a strong selling point for an educated buyer. Evaluated at eye level, the inclusions are minimal and do not interrupt the optical pathways that produce the adularescent glow, and in some cases they can even enhance the play of color by providing additional scattering centers. The excellent polish achieved on this stone means that facet junctions are clean and reflective, allowing the asscher geometry to perform to its potential. The medium light color intensity is an ideal balance for rainbow moonstone, preserving sufficient body tone to showcase spectral flashes without overpowering the subtle adularescence with opacity. Importantly for collectors and designers seeking durable value, there has been no enhancement applied to this specimen, so its optical properties are natural and stable. Provenance from Madagascar further supports its desirability, as Malagasy moonstones are highly regarded for clarity and attractive spectral effects produced by the region’s pegmatitic deposits, and this provenance is something The Natural Gemstone Company documents and stands behind.

For practical use and care this moonstone is exceptionally well suited to become the centerpiece of a ring or pendant where the asscher shape and step facets can be showcased, and a secure setting such as a bezel or protective crown should be considered to protect the stone edge from knocks and abrasion. Moonstone measures approximately six to six and a half on the Mohs scale, so it requires slightly more considerate wear than harder gemstones, but its toughness is adequate for everyday jewelry when appropriately set. For cleaning avoid harsh chemicals and ultrasonic baths, and instead use warm soapy water and a soft brush or a cloth to preserve the polish and surface luster. For the discerning buyer who values traceable origin, natural optical phenomena, and precision cutting, this 1.92 carat asscher octagon rainbow moonstone from Madagascar represents a balance of rarity, beauty, and integrity. If you wish to examine additional images, request viewing under different lighting conditions, or discuss setting options, The Natural Gemstone Company will provide further details and personalized guidance to ensure this gem is matched to your design vision and long term collection goals.