2.65 Ct. Cabochon Moonstone from Madagascar

We are pleased to present a beautiful translucent 2.65 carat, trillion shape blue flash moonstone, set to appeal to both collectors and connoisseurs. The gem measures eight point six four by eight point five two by five point one two millimeters, and has been expertly fashioned as a cabochon to maximize its signature adularescence. The surface displays a cool, spectral blue flash that plays across the triangular dome as light moves, a trait that is much prized in quality moonstone specimens. The medium light body color allows the internal sheen to show cleanly without overwhelming the stone, and the excellent polish gives a smooth, reflective finish that enhances both the flash and the tactile feel of the gem. Presented by The Natural Gemstone Company, this piece is a refined example of what collectors seek when selecting a moonstone with strong aesthetic appeal and precise lapidary work.

From a clarity and treatment perspective this moonstone is graded eye clean when evaluated at normal viewing distance, indicating that no inclusions are apparent to the naked eye and that the visual field remains free of distracting marks. The gem has received no enhancement, and this untreated condition is important to educated buyers who value natural optical phenomena and provenance. Origin is Madagascar, a well regarded locality for quality moonstone material that often exhibits pronounced adularescence and attractive body tones. The cabochon cut has been chosen to present the blue flash in a centered and symmetrical way, which increases the perceived size and optical depth of the stone, making it particularly suitable for elegant solitaire settings or as a refined focal element in artisan jewelry.

For those who prefer precise gemological context, moonstone belongs to the feldspar group, and its play of light results from the microscopic intergrowths of albite and orthoclase. When light scatters through these lamellar intergrowths, the phenomenon commonly called adularescence produces the soft blue sheen that traverses the surface. This effect is mechanically and optically distinct from the phenomenon seen in opals, though visually the gem may sometimes be compared to opalized material for its luminous quality. Opal type White Opal. The trained eye will note the difference in structure, as opal is a hydrated amorphous form of silica, while moonstone is a crystalline feldspar, and these differences influence hardness, care, and long term stability. The cutting and polishing approach taken by our lapidary was aimed at preserving the natural adularescence, achieving a smooth dome that directs the flash, and maintaining symmetrical proportions for the trillion outline so that the gem sits securely in a setting and delivers a balanced visual presentation.

When considering durability and everyday wear, it is important to compare this moonstone on the Mohs hardness scale, because hardness directly impacts resistance to scratching and surface wear. Moonstone typically rates six to six point five on the Mohs scale. By comparison diamond is ten, sapphire and ruby are nine, topaz is eight, and quartz is seven. Many types of opal range from five point five to six point five in hardness depending on water content and internal structure, which makes the White Opal reference relevant when considering similar care requirements. The practical implication is that moonstone is softer than many classic engagement gem choices, but it remains suitable for rings and pendants when set with protective considerations. We recommend protective settings such as bezel or half bezel mounts that shield the girdle and edges, and we advise avoiding long term exposure to rough abrasion or heavy impact. Cleaning should be done with a soft cloth and mild soapy water, avoiding high heat, steam, and ultrasonic cleaners which can stress the internal structure. With appropriate care and well chosen settings, a moonstone of this grade will retain its attractive sheen and surface condition for many years.

This 2.65 carat, trillion blue flash moonstone from Madagascar is presented by The Natural Gemstone Company as a fine example of untreated, eye clean material with excellent polish and a pleasing medium light color intensity. For the educated buyer seeking both aesthetic quality and documented attributes, this gem combines collectible adularescence, reliable origin information, and lapidary workmanship that enhances optical performance. Its cabochon cut and triangular format offer distinctive design possibilities for jewelers and private collectors who want a luminous centerpiece that reads as both elegant and natural. If you would like further technical details, additional high resolution images, or discussions about custom mounting options to protect and showcase the stone, we are available to assist, and we stand behind the natural, untreated status and documented provenance that accompanies each item from our inventory.