1.51 Ct. Greenish Blue Sapphire from Madagascar

One beautiful transparent 1.51 carat cushion shape greenish blue sapphire is presented, measuring 7.53 by 4.68 by 3.85 millimeters. The cutting style is faceted, executed in a mixed brilliant cut that balances table and crown facets for controlled brilliance and scintillation. The clarity grade is very very slightly included when evaluated at eye level, indicating that inclusions are minimal and do not detract from the visual appearance in typical viewing conditions. Color intensity is described as intense, and the polish is excellent, producing crisp facet junctions and lively light return. Enhancement testing indicates no enhancement, and the sapphire is of Madagascar origin, a source known for producing richly colored sapphires with good clarity and natural character. The Natural Sapphire Company documents the stone attributes in detail, reinforcing the gem provenance and treatment status for confident design decisions.

The optical performance of this cushion shape sapphire owes much to the mixed brilliant cutting style and the stone proportions. The wider table and controlled pavilion angles create a balanced appearance between face up color and internal sparkle, allowing the intense greenish blue hue to read strongly while maintaining lively internal reflections. The cushion outline provides a soft rectangular silhouette with gently rounded corners, which can elongate or broaden depending on orientation within a mounting. The depth of 3.85 millimeters contributes to a pleasing facet play without excessive depth that would reduce face up size, and the transparency permits light to pass cleanly through the stone, emphasizing both saturation and tone. Excellent polish enhances surface luster, and the very very slightly included clarity grade ensures that the gem remains eye clean for most settings, while still retaining natural character under magnification. The natural, unenhanced origin from Madagascar underscores color stability and long term integrity for everyday wear.

This sapphire adapts readily to a wide variety of jewelry settings, making it a versatile choice for bespoke and classic designs. As a center stone for an engagement ring, the cushion shape and 1.51 carat weight suit both solitaire and halo designs, with a halo of small brilliant cut diamonds or sapphires increasing perceived size and accentuating the intense color. Prong settings permit maximum light entry, showcasing the mixed brilliant cut, while bezel settings provide a contemporary, secure enclosure that protects the girdle and corners. The stone is well suited to three stone layouts, where tapered or baguette side stones provide linear emphasis, and to cluster compositions that emphasize color contrast. For everyday jewelry, low profile settings with protective galleries reduce snagging, and half bezel or flush options enhance durability without significantly obscuring the stone face up area. In pendant and drop earring applications, the cushion shape offers graceful movement, and paired settings can be designed to match proportions for symmetrical earring pairs or stud configurations. The color presents attractively against white metals for contrast, and against yellow or rose metals for a warmer appearance, enabling tailored metal selection according to the desired aesthetic.

Technical considerations for setting this gemstone address proportion, security, and visual presentation. The 7.53 by 4.68 by 3.85 millimeter dimensions indicate an elongated cushion profile, and setting seat geometry should accommodate the length to width ratio to maintain even prong placement and consistent light return across the table. For prong mounts, four or six prongs work depending on the chosen style, with prong placement at the corners recommended to protect the rounded edges. A thin bezel can follow the cushion outline closely, increasing security while maintaining the apparent size, whereas a thicker bezel will reduce face up area and should be factored into diameter calculations when translating carat weight to visible proportions. For tension settings or designs that apply side pressure, the cutter and setter must verify girdle integrity and ensure the stone is adequately supported, given the transparent nature and facet structure. Side stone protocols, such as using tapered baguettes or small rounds, should consider facet alignment and visual balance, to avoid unwanted optical interactions that might mute the central stone. The very very slightly included clarity grade means that inclusions are unlikely to influence setting decisions, but routine lapidary evaluation and seat fitting are advised for optimal secure mounting.

The Natural Sapphire Company can assist with technical guidance and bespoke design consultation, providing precise measurements, high resolution imagery, and gemological documentation to support fabrication. Designers and clients will find this 1.51 carat cushion shape greenish blue sapphire suitable for a broad range of wearable art, from classic engagement rings to contemporary pendants and tailored earrings, with options for protective bezels, open prong seats, halo enhancement, or mixed metal contrast. The combination of intense natural color, excellent polish, mixed brilliant facet architecture, and unenhanced origin from Madagascar makes the stone a reliable candidate for long term wear and for projects that require natural, untreated gemstones. For clients seeking a personalized jewelry piece, considerations such as metal selection, prong count, bezel profile, and companion stone types will influence final appearance, and The Natural Sapphire Company provides informed recommendations to translate the gem attributes into enduring, precisely executed designs.