6.39 Ct. Bluish Green Prasiolite from Brazil

Presenting a striking transparent 6.39 carat oval bluish green prasiolite, precisely measured at 13.09 by 11.03 by 7.77 millimeters, faceted to showcase a mixed brilliant cut that balances scintillation and preserved weight. The color is described as intense, a deep bluish green that stands out in both daylight and artificial lighting, and the stone has been evaluated as eye clean at normal viewing distance, meaning no inclusions are visible without magnification. The polish is excellent, creating crisp facet junctions and lively light return, while the mixed brilliant style enhances both table sparkle and pavilion brilliance, giving a refined, gem quality appearance. This piece has been irradiated to achieve its vivid hue, a common and accepted enhancement for prasiolite, and its origin is Brazil, a provenance known for producing high clarity, well formed quartz crystals suitable for fine faceting.

For an informed buyer, the mixed brilliant faceting is an important technical detail that affects how the gem performs in jewelry, particularly when set under different lighting conditions. The oval shape and the proportions implied by the 13.09 by 11.03 by 7.77 millimeter dimensions provide an elegant length to width ratio, which flattens visually on the finger or neckline and increases perceived size without excessive depth that would reduce visual spread. The excellent polish ensures minimal surface abrasion, increasing the apparent transparency and color depth. The eye clean clarity grade means the gem displays a clean, uncluttered window of color, permitting strong saturation without distracting internal features, which appeals to collectors who prioritize optical performance as well as to designers seeking a centerpiece stone with reliable visual purity.

Understanding treatments and origin is essential for valuation and long term satisfaction, and transparency on both points is why we state that this prasiolite is irradiated and sourced from Brazil. Natural, untreated green quartz of the prasiolite type is rare, and the market commonly offers material that has been subjected to controlled irradiation or heating in order to produce the desirable green tones, often from starting amethyst or other quartz varieties. Irradiation is a stable and accepted enhancement when properly performed and disclosed, and it can yield consistent and pleasing hues, while Brazilian material is prized because of its clarity, crystal size, and suitability for cutting. For the educated buyer who understands the balance between rarity and treated material, this stone represents a compelling combination of quality parameters, including intense color, eye clean clarity, excellent polish, and a reputable geographic origin.

Durability is a critical factor for everyday wear, and prasiolite is a variety of quartz, which rates seven on the Mohs scale of mineral hardness. This places it above commonly used softer gems such as opal and turquoise, and below more durable gems such as sapphire at nine and diamond at ten, with topaz at eight occupying an intermediate position. A Mohs seven rating means the stone resists scratches from many materials encountered in daily life, but it will not be as impervious to abrasion as corundum or diamond. For this reason, we recommend protective settings for rings, such as bezel or semi bezel mounts, and consider prasiolite an excellent choice for pendants and earrings where impact risk is lower. Cleaning with warm, soapy water and a soft brush is safe, while aggressive chemicals, high heat, or prolonged exposure to intense light should be avoided to preserve color stability. At The Natural Gemstone Company we provide full disclosure of treatments and origin, and we are available to advise on the best settings and care practices to ensure this 6.39 carat Brazilian prasiolite remains a durable and beautiful centerpiece for your jewelry collection.