1.65 Ct. Moonstone from Ceylon (Sri Lanka)

One beautiful transparent 1.65 carat oval shape rainbow moonstone is offered with exact dimensions of 10.10 x 6.36 x 4.77 mm, featuring a mixed brilliant cut and a clarity grade of slightly included evaluated at eye level. This stone displays medium color intensity and an excellent polish, and it has received no enhancement. The origin is Ceylon, Sri Lanka, a well regarded source for high quality moonstone material. As a gemstone specialist speaking on behalf of The Natural Gemstone Company, I present these facts to situate the gem for a discerning buyer who values measured information about cut, clarity, color, and provenance. The oval outline provides classic wearable proportions, while the mixed brilliant faceting pattern balances scintillation and the signature moonstone phenomenon known as adularescence.

Clarity for moonstone must be judged differently than for transparent faceted gems such as diamond or sapphire, because the character and placement of internal structures directly influence the optical effect rather than solely detract from it. This specimen is graded slightly included at eye level, meaning that under normal viewing conditions a trained eye will note small inclusions or fine layering, but those internal features do not interrupt the smooth and luminous glow that defines a high quality rainbow moonstone. In many cases a small degree of internal structure can enhance the three dimensional sheen, as the adularescent band forms where alternating feldspar layers scatter light. The excellent polish ensures minimal surface disruption to light return, so the stone reads as transparent and lively. No enhancement confirms the gem is in natural state, a significant point for collectors and buyers who prefer untreated material.

Optically the rainbow moonstone offers an experience different from more common white gemstones. Diamonds achieve brilliance through high refractive index and strong dispersion, producing sharp flashes of white light and colored fire. Sapphire and topaz generate bright brilliance based on higher refractive indices than moonstone, which typically exhibits a refractive index near 1.52 and low birefringence. Those metrics explain why moonstone does not flash like a diamond. Instead moonstone excels in adularescence, a soft, moonlike billow of light that glides beneath the surface and can appear blue white or multicolored in rainbow specimens. The mixed brilliant cut of this oval moonstone is deliberately chosen to enhance both scintillation and the internal adularescent sheen. The crown faceting encourages light to enter and be scattered by internal lamellae, while pavilion facets return a layered glow. In practical terms a client will notice a diffused, silky luminescence that moves with depth and angle, compared to the more point specific flashing of brilliant cut common gems. For those who prize subtlety, atmosphere, and unique optical phenomena, the moonstone offers a form of brilliance that is highly distinct and desirable.

Provenance from Ceylon, Sri Lanka, adds tangible value and credibility for an educated buyer familiar with global gem sources. Sri Lankan moonstones are known for their clean body color, attractive adularescence, and the occasional strong blue or spectral flash in rainbow varieties. When evaluating long term value one should factor not only carat weight and dimensions but also cut quality, polish, natural state without enhancement, and origin documentation. This 1.65 carat oval is particularly well suited to become the centerpiece of a refined ring or pendant where its 10.10 x 6.36 x 4.77 mm proportions will display prominently. For collectors who assemble specimens by locality, the clear Sri Lankan origin recorded by The Natural Gemstone Company supports confident acquisition. If you are seeking a wearable gem with distinct optical personality or a distinctive addition to a collection, this mixed brilliant cut rainbow moonstone combines measured transparency, pleasing color intensity, and excellent polish in a natural, unenhanced package. Contact The Natural Gemstone Company for additional images, viewing options, and certified details to support an informed purchase.