0.83 Ct. Blue Sapphire from Tanzania

This 0.83 carat cushion shape blue sapphire, with measured dimensions of 5.81 by 5.12 by 2.85 millimeters, is an exceptional natural gemstone choice for an engagement ring. Cut as a mixed brilliant, the pavilion and crown facet arrangement is designed to balance scintillation and color saturation, producing lively light return while preserving the stone’s deep blue tone. The sapphire is transparent, and its polish is graded excellent, ensuring crisp facet junctions and maximum surface luster. Clarity is evaluated as slightly included at eye level, a grade that indicates minor internal characteristics which do not detract from the gem’s overall beauty and which serve as natural fingerprints of an untreated stone. Importantly, this sapphire has received no enhancement, a quality that is increasingly prized by discerning buyers who value natural state and long term integrity, and its documented origin is Tanzania, a source known for producing rich, naturally colored sapphires.

From a gemological and practical perspective this sapphire is very well suited to the daily demands of an engagement ring. Sapphire rates nine on the Mohs hardness scale, second only to diamond in everyday durability, which means it resists abrasion and maintains polish under normal wear. The cushion outline combined with the mixed brilliant cut provides both a classic silhouette and modern brilliance, allowing the vivid color intensity to remain the dominant visual impression while also offering pleasing fire and sparkle. Slight inclusions, when present in a stone of this color and cut, often help to diffuse light in a way that enhances depth and character, rather than diminishing visual appeal. The excellent polish optimizes facet reflections, and the stone’s medium dimensions and 0.83 carat weight make it a versatile center that sits elegantly in settings ranging from a refined solitaire to a halo or three stone design.

For a lifetime piece such as an engagement ring, setting choices should protect the gem while showcasing its color. A low profile four or six prong setting crafted in platinum or 18 karat white gold will accentuate the sapphire’s blue saturation, while a warm yellow gold mount will intensify the gem’s richness and offer a timeless contrast. For additional protection of the cushion corners and for a contemporary aesthetic, a bezel or partial bezel setting is recommended, and for those seeking maximum presence without increasing carat weight, a pavé halo will visually enlarge the center stone while adding complementary sparkle. Routine care is straightforward, use warm soapy water and a soft brush for cleaning, avoid harsh chemicals and ultrasonic cleaning if inclusions are uncertain, and have the setting inspected annually to secure the mounting. The Natural Sapphire Company can advise on preferred settings that balance protection, comfort, and display, and can accommodate custom design requests to ensure the finished ring reflects both the gem’s natural strengths and the wearer’s personal style.

For an educated buyer considering provenance, durability, and long term value, this Tanzanian cushion sapphire represents a compelling combination of attributes. Unheated, vivid color, and an excellent polish speak to a gem that will age gracefully and retain desirability, while the slight inclusions confirm its natural origin and make each stone unique. The Natural Sapphire Company stands behind its gems with detailed information and service, offering certified documentation and bespoke setting advice so purchasers can make an informed, confident choice. Whether selected for their symbolic meaning, their practical resilience, or their aesthetic distinction, sapphires remain a meaningful alternative to a traditional diamond engagement ring, and this 0.83 carat cushion shape blue sapphire is particularly well matched to someone seeking a beautiful, durable, and naturally sourced center stone.