1.63 Ct. Alexandrite from Tanzania

When you are searching for a gemstone that resolves the common dilemma between beauty and practicality, this alexandrite from The Natural Gemstone Company closes the case. Whether your brief is a one of a kind engagement ring that will be passed down through generations, a signature pendant that becomes a daily talisman, or a rare stone to add to a discerning collection, this gem answers those needs with clarity and confidence. Many clients tell us they want a stone that feels special without feeling impractically large, a color story that tells a different tale under different lights, and a shape that sits comfortably in a variety of custom designs. This 1.63 carat cushion shape alexandrite delivers all of those qualities, and more. It offers the kind of presence that reads elegant on the hand, the versatility that suit designers and makers appreciate, and the natural character that collectors seek, and we at The Natural Gemstone Company are proud to present it as a finished solution for those exact needs.

Examining the technical attributes makes it clear why this alexandrite stands apart, and why it is especially well suited for custom settings. The stone weighs 1.63 carat, and measures 6.69 x 6.52 x 4.74 mm, a size that translates to a beautiful visual presence without overwhelming the overall design. Its cushion shape combines soft rounded corners with an elegant rectangular square footprint, providing both a romantic vintage silhouette and modern adaptability. The mixed brilliant cut creates a lively play of light, with precision facets on the pavilion that return light to the eye and a crown that balances fire with depth. The clarity is described as very slightly included when evaluated at eye level, which means the inclusions do not distract in everyday wear, and they confirm the natural origin of the stone without compromising its brilliance. The color intensity is medium, embracing the defining trait of alexandrite, the dramatic color change from a yellowish green in certain light to a reddish brown in other light sources, creating an entrancing personality that responds to sunlight and indoor illumination.

For custom jewelry designers and clients alike, the physical proportions and the cushion shape of this alexandrite make it exceptionally easy to set and exceptionally rewarding to wear. The 6.69 x 6.52 mm table and the 4.74 mm depth work harmoniously for a range of settings, allowing bezel, prong, and hybrid mounts to be executed with secure precision and aesthetic balance. A cushion cut of this profile sits canvas like on the finger or neck, making it ideal for halo settings that amplify sparkle, for solitaire designs that let color change steal the show, or for three stone mounts where side stones can be chosen to pick up either the green or the red facets of the alexandrite. The mixed brilliant facets provide scintillation that enhances movement within the piece, which is particularly desirable in engagement rings where every tilt of the hand reveals new flashes of color and light. The excellent polish ensures smooth, reflective facet junctions, which helps settings appear seamless and finished, reducing the need for intrusive metal prongs and allowing the gem to take center stage.

Beyond practical considerations this gemstone excels as a meaningful and responsible choice. It is a natural alexandrite originating from Tanzania, and it has no enhancement, which assures clients that they are purchasing an authentic, untreated gem with inherent color and character. For collectors who value provenance and untreated material, this is a decisive attribute. The very slight inclusions that are visible only under magnification are a hallmark of natural growth and make each stone unique, while the medium color intensity and responsive color change give the gem dramatic visual interest without depending on artificial treatments. This combination of natural origin, no enhancement, and strong gemological characteristics elevates the stone to a conversation piece, a wearable work of art that embodies both rarity and integrity. At The Natural Gemstone Company we place a high value on clear documentation and ethical sourcing, and we can provide the information you need to feel confident about the origin and the quality of this alexandrite as you plan your custom piece.

If your priority is creating a custom piece that feels bespoke from first glance to final polish, this cushion alexandrite is the perfect starting point. Its size is suited to an engagement ring that is meant to be worn every day, or to a pendant that offers a dramatic reveal as light changes throughout the day. Consider pairing it with warm metals like 18 karat yellow gold to bring forward the red brown tones, or with cool metals like platinum or white gold to emphasize the yellowish green to bluish hues under certain light. A delicate halo of small diamonds will enhance the mixed brilliant cut and add timeless fire, while tapered baguettes on either side will elongate the finger and accentuate the stone's cushion profile. Our design team at The Natural Gemstone Company is experienced in translating these aesthetic directions into technical reality, and we welcome the opportunity to collaborate on bezel, prong, or custom gallery details that protect the stone while celebrating its color change and facet performance. For maintenance, gentle cleaning with warm water, a mild soap, and a soft brush is recommended, storing the stone separately to avoid abrasion, and scheduling periodic inspections to ensure settings remain secure, and our team is available to advise on any specific care questions you may have.

In short, this 1.63 carat, cushion shape, yellowish green to reddish brown alexandrite from Tanzania is a rare blend of visual drama, everyday practicality, and natural integrity. Its dimensions of 6.69 x 6.52 x 4.74 mm, mixed brilliant cut, very slightly included clarity at eye level, medium color intensity, and excellent polish make it uniquely suited for custom jewelry that must perform as beautifully as it looks. If your need is an engagement ring that will be admired for generations, a one of a kind pendant that reveals different moods in different light, or a collector piece that underscores natural rarity and ethical sourcing, this alexandrite answers all of those demands. Contact The Natural Gemstone Company to discuss design options, to request additional images or lighting views, or to begin the custom process, and allow us to help you realize a piece that truly ends the search.