1.96 Ct. Moonstone from Madagascar

One beautiful transparent 1.96 carat emerald cut rainbow moonstone, dimensions 8.86 x 6.36 x 5.13 mm, offers a refined balance of size and optical performance that will appeal to collectors and designers who appreciate technical precision. The stone presents a classic emerald cut with step facets that create broad, planar surfaces and truncated corners, enhancing symmetry and face up stability. Clarity is graded slightly included at eye level, consistent with natural feldspar material, and does not compromise the gem s overall presence. Color intensity is light, which allows superior light transmission, and the polish grade is excellent, delivering a silky surface finish that maximizes internal reflection. This specimen is unenhanced and sourced from Madagascar, and it is offered to you by The Natural Gemstone Company, a supplier committed to natural material integrity and meticulous evaluation.

The rainbow moonstone belongs to the feldspar group and derives its signature optical phenomena from the microscopic lamellar intergrowth of feldspar species. Alternating layers of albite and orthoclase create thin film interference, yielding adularescence and selective dispersion of wavelengths that appear as blue to multicolored flashes as light is scattered and phase shifted within the structure. The gem s refractive index is in the range 1.518 to 1.526, with low birefringence on the order of 0.005 to 0.010, which gives the sheen a soft, coherent quality rather than the high scintillation typical of high refractive index stones. Specific gravity falls near 2.56 to 2.62, and Mohs hardness is six to six point five, characteristics that align with feldspar minerals and that inform handling and setting practices. The internal lamellar architecture acts as an optical lattice that both scatters and channels light, producing a layered depth and a shifting play of color that is intrinsically different from the faceted brilliance of higher index gems.

The emerald cut in this piece is an intentional and technical choice to emphasize the moonstone s adularescence and linear flash behavior, rather than to prioritize pavilion scintillation. The cut s elongated table and stepped crown facets provide broad planes for light to enter, reflect off internal lamellae, and re emerge in controlled bands. The gem measures 5.13 mm in depth with an average face dimension that yields a depth that is approximately sixty seven point four percent of the mean face dimension, and the length to width ratio is approximately 1.39 to 1, proportions that maintain elegant rectangular form while preserving sufficient depth for interference effects to develop. Step faceting produces parallel field flashes that travel along the long axis and the short axis as the stone is rotated, creating a ribbon like shimmer interspersed with discrete rainbow flashes where the lamellae align with the incident light. The excellent polish is critical, because even subtle surface irregularities would diffuse the interference pattern and mute the moonstone s signature sheen. In this example the combination of transparency, light body color, and precise step faceting yields a face up presentation where adularescence appears as a bright, living luminosity that can be stronger and more directional than in equivalent cabochon materials.

Slight inclusions observed at eye level are intrinsic to natural moonstone and are typically formed by the same lamellar intergrowths that create the visual effect, or by minor growth fissures and platelets. Rather than detracting, these features can add depth cues and internal contrast that enhance the perceived motion of the sheen when the gem is tilted under a directional light source. Because there are no heat or chemical enhancements, the optical behavior you see is natural and stable. For best display, orient the emerald cut so that the table faces the primary light source and place the long axis parallel to the direction of viewer movement to maximize the ribbon like flashes. Settings that expose the crown and allow light to enter freely, such as low prong or open bezel designs, will retain protection while allowing the adularescence to breathe. Care recommendations include avoiding ultrasonic cleaners and harsh chemicals due to the cleavage planes and moderate hardness, and routine cleaning with warm soapy water and a soft brush to maintain the pristine polish. This transparent 1.96 carat emerald cut rainbow moonstone from Madagascar represents a refined example of feldspar optical engineering, and The Natural Gemstone Company stands ready to provide detailed viewing angles, lighting condition photographs, and setting advice to specialists and clients who seek a stone with technical pedigree and a luminous, unmatched sparkle.