1.51 Ct. Greenish Blue Sapphire from Madagascar

One beautiful transparent 1.51 carat oval shape greenish blue sapphire, with dimensions of 6.83 by 5.68 by 4.39 millimeters, is presented by The Natural Sapphire Company, and this stone exemplifies premium quality in its weight and overall presentation. The 1.51 carat weight places this sapphire in a size category that is immediately noticeable on the finger while remaining eminently wearable, and the physical measurements confirm a substantial presence for an oval cut. The mixed brilliant cut creates a lively interplay of light across the table and crown facets, while preserving weight in the pavilion and enhancing the gem when set, and the excellent polish further maximizes surface brightness and lens like clarity. The combination of carat weight, cut efficiency, and finish positions this gem as a tasteful statement piece for a fine jewelry commission or a discerning collector who values natural, untreated material.

Color is the primary driver of value for a sapphire, and this stone displays a greenish blue hue with medium light color intensity that reads as fresh and vivid in natural light. The greenish blue tone sits between classic cornflower blue and teal, offering a modern and versatile appearance that pairs well with both white metals and yellow or rose gold. Because this sapphire has no enhancement, the tone and saturation are wholly natural, and that purity of color is especially attractive to educated buyers who prize provenance and untreated material. Origin contributes materially to market perception, and Madagascar has earned a strong reputation for producing gem quality sapphires in a wide range of blue and teal tones, the geological environments in Madagascar often yield stones with interesting color characters and very good crystal quality, and this specimen carries that regional signature in a way that is consistent with higher value untreated material.

Clarity and cutting deserve particular attention, and this sapphire carries a clarity grade of very very slightly included evaluated at eye level, which indicates inclusions are minimal and do not impact visual performance or structural integrity under typical wear conditions. At the 1.51 carat size, eye level clarity of this grade ensures excellent transparency and light transmission, and the mixed brilliant cut amplifies scintillation while balancing color saturation. With the dimensions provided the stone exhibits a depth of approximately 70 percent, which is a deliberate proportion that retains carat weight and often enhances apparent color without sacrificing durability, and the excellent polish confirms precise lapidary work that yields crisp facet junctions and superior surface finish. For an educated buyer, these combined attributes mean the sapphire will perform exceptionally well in jewelry, offering bright facet flashes, stable color under various lighting conditions, and long term wearability.

From an investment and design perspective, a natural unenhanced sapphire of 1.51 carats, with the attributes described, represents a compelling offering. The size is large enough to function as a distinctive central gem in a solitaire, halo, or three stone design, yet it remains comfortable for regular wear, and settings that expose the pavilion and allow light entrance will optimize brilliance and show off the nuanced greenish blue hue. The Natural Sapphire Company sources and presents gems with full disclosure of origin and treatment, and this Madagascar stone is a strong example of the premium end of natural sapphires because of its unenhanced color, eye level clarity, quality of cut, and weight. For a buyer seeking a balance of rarity and practicality, this 1.51 carat oval sapphire embodies those priorities, delivering tangible presence on the hand, enduring gemological qualities, and the assurance that comes from transparent sourcing and meticulous grading.