5.51 Ct. Moonstone from Ceylon (Sri Lanka)

When you are searching for a singular gem that answers every need for beauty, rarity, and wearability, this rainbow moonstone from The Natural Gemstone Company is the answer. We understand that you may be looking for an engagement center that catches the light like a secret, an heirloom quality stone for a bespoke ring, or a rare specimen to add to a collector cabinet. This semi transparent oval rainbow moonstone, weighing 5.51 carats, measures 11.38 x 9.72 x 8.78 mm, and comes from the storied mines of Ceylon, Sri Lanka. Cataloged within our listings as a White Opal type, this piece blends the soft, ethereal base tone of a white opal family stone with the classic adularescent character of moonstone, offering an appearance that is at once delicate and commanding. From the moment you set eyes on it, you will see why this gem answers the desire for something both wearable and museum worthy, and why collectors and couples alike are drawn to its understated yet complex personality.

The gem’s mixed brilliant cut and carefully arranged geometric faceting are the true engineering behind the spectacle. The cutter combined a brilliant style crown with a precision faceted pavilion to maximize internal reflection and light return, creating a choreography of light that dances through every plane of the stone. Each facet is positioned to catch incident light and direct it across the semi transparent body, so that adularescence appears as a shifting ribbon of blue, peach, and lavender depending on angle and light source. The oval outline provides a generous table and an elegant silhouette, while the mixed brilliant geometry prevents light leakage and enhances scintillation. In practical terms this means the stone will appear lively and animated on the hand, responding to movement and varying light conditions with flashes and layers of color, and providing the exact dramatic play that collectors seek and that couples want in a daily wear piece.

This moonstone was evaluated at eye level and given a clarity grade of very slightly included, a mark that assures you of a clean presentation to the unaided eye, with only minor inclusions visible under close inspection. The stone carries a medium light color intensity, a balance that preserves luminosity without becoming washed out, and it has an excellent polish that allows facets to act like tiny mirrors, boosting sparkle and depth. The gem has been heat treated as an enhancement to optimize optical properties, a standard practice when done conservatively and disclosed fully, as we do at The Natural Gemstone Company. Heat treatment here serves to refine color balance and elevate the adularescent effect without compromising the gem’s natural character or durability. The semi transparent nature of the material allows light to penetrate and interact with internal structures, creating the layered glow that defines a first class rainbow moonstone, and the combination of cut, polish, and modest enhancement ensures you receive a jewel that is beautiful, stable, and ready to set.

If your need is a unique engagement ring center, an eye catching pendant, or a showpiece for a collector, this Sri Lankan rainbow moonstone fulfills those roles with graceful authority. The stone’s origin in Ceylon contributes to its appeal, as Sri Lankan material is prized for its clarity and nuanced color play, and the classification as White Opal type in our catalog highlights its soft opaline base while celebrating its moonstone personality. At The Natural Gemstone Company we are committed to matching gems to the intent behind a purchase, and this piece addresses the desire for a gem that will stand out without overt flashiness, that will age gracefully, and that will perform under the scrutiny of daily wear. We invite you to consider custom setting options that enhance the oval silhouette and protect the girdle while allowing maximum light exposure to the crown, and we offer detailed photographs and viewing under varied lighting to confirm that the geometric faceting performs as promised. When you are ready to make this stone the solution to your search, we will guide you through certification, setting recommendations, and care instructions so this moonstone will remain a luminous companion for years to come.