18.34 Ct. Yellowish Green Prasiolite from Brazil

I am pleased to present a remarkable prasiolite that stands apart because of its size and clarity, an outstanding offering from The Natural Gemstone Company. This transparent yellowish green prasiolite weighs 18.34 carat, a weight that immediately places it into a rare category for this gemstone type, and its substantial dimensions of 15.89 x 15.72 x 12.69 mm give it a strong presence that smaller stones cannot match. The stone is cut in a round shape with a faceted mixed brilliant cut that balances scintillation and depth of color, and it has an excellent polish that maximizes light return. Graded as eye clean when evaluated at eye level, and showing intense color intensity, this prasiolite combines the visual purity collectors seek with the vibrant hue that makes it wearable in high impact jewelry. Originating from Brazil, a region known for producing fine green and yellow green gemstones, this piece has been heat treated to stabilize and enhance its tone, a standard enhancement that yields consistent, enduring color without compromising integrity.

When compared to other prasiolites and green gemstones on the market, the 18.34 carat weight is the most compelling differentiator. Many prasiolites offered commercially are small accent stones under five carat, or mid sized stones in the eight to twelve carat range, and faceted examples above fifteen carat with eye clean clarity are uncommon. The value of prasiolite, like many colored gemstones, increases disproportionately with size because larger clean material is much rarer, and the presence of a vivid, evenly distributed yellowish green hue further amplifies desirability. Compared to green quartz or heat treated amethyst pieces of comparable tone, this prasiolite offers superior transparency and a round mixed brilliant cut that produces a lively pattern of flashes and table brightness. Buyers who compare similar stones will find that this prasiolite offers better clarity and a more wearable round outline than many larger rough cuts or heavily included alternatives.

Beyond immediate visual appeal, the weight enhances the stone as an investment quality gem and as a design focal point. At 18.34 carat this prasiolite is large enough to command center stage in a statement ring or pendant, and its round mixed brilliant facet arrangement makes it easier to parcel into classic and contemporary settings without sacrificing light performance. For custom jewelry designers and collectors who evaluate material by carat weight, clarity, and cut, this stone meets high standards, offering eye clean clarity and an excellent polish that reduces the need for remedial grinding and polishing, preserving weight and value. The heat treatment applied is a commonly accepted and stable enhancement for prasiolite, ensuring the intense color remains reliable through typical wear, while the Brazilian origin adds provenance and aligns with markets that value well documented sources. When price per carat is considered, the larger the carat weight and the better the clarity, the more favorable the long term value proposition, and this prasiolite represents a strong balance of initial purchase value and potential appreciation.

At The Natural Gemstone Company we present this 18.34 carat round yellowish green prasiolite as an exceptional choice for discerning buyers who want a rare, sizable, and beautifully finished gem. We can provide further information on grading, condition, and suggested mounting options, and we are able to arrange photography and viewing to confirm the intense color intensity, the eye clean clarity when evaluated at eye level, and the impressive dimensions of 15.89 x 15.72 x 12.69 mm. If you compare alternatives, consider that the combination of weight, mixed brilliant faceting, excellent polish, and Brazilian origin offered here is difficult to match in the current marketplace. For collectors and designers seeking a gemstone that stands out visually and holds its value, this prasiolite represents a superior choice, and The Natural Gemstone Company is ready to assist with provenance documentation, secure handling, and tailored advice for setting and appraisal.