5.88 Ct. Bluish Green Prasiolite from Brazil

This exceptional prasiolite is a transparent oval faceted gemstone weighing 5.88 carat, with precise dimensions of 13.27 by 10.79 by 7.32 millimeters, presented by The Natural Gemstone Company. The cutting style is faceted with a mixed brilliant cut, a design chosen to balance optimal color saturation and light return for an oval outline. The hue is a striking bluish green with intense color intensity, a rarity in prasiolite which more commonly appears in pale or muted tones. Clarity is graded as eye clean when evaluated at eye level, meaning no inclusions are visible to the naked eye under normal viewing conditions, and the polish has been assessed as excellent, giving smooth, reflective facet planes that maximize brilliance and snap. This stone has undergone irradiation as a disclosed enhancement, a standard and widely accepted treatment for producing prasiolite from certain quartz material, and originates from Brazil, a locality noted for producing high quality quartz varieties with consistently desirable crystal structure and clarity.

For an educated buyer, understanding the specific attributes that determine value is essential, and this prasiolite excels across the primary criteria of color, clarity, cut, weight, and polish. Color intensity is the most significant driver of value in prasiolite and other colored gemstones. The intense bluish green displayed here is uncommon and visually compelling, allowing the stone to present well in larger sizes without appearing washed out. The mixed brilliant cut is intentionally selected to combine the scintillation of a brilliant cut with the depth control of step facets, yielding strong light return while preserving the saturated color you want in a high quality collector piece. An eye clean clarity grade elevates desirability and practical appeal because it means the gemstone will present a clean face up appearance, important in both display and jewelry settings. The excellent polish ensures that facet junctions are crisp and reflective, which improves both perceived transparency and the stone setting dialogue with light. As to treatments, irradiation is a stable and accepted enhancement when properly performed and disclosed, and it is commonly followed by thermal stabilization to lock in tone. Our disclosure of this enhancement aligns with best practice and assures provenance and treatment transparency, which is critical for resale and certification.

The Brazilian origin adds a provenance narrative that discerning collectors appreciate, as Brazil has a long history of producing gem quality quartz and related varieties with predictable physical properties and attractive crystal habit. The combination of a nearly six carat weight, an oval form that lends itself to many classical and contemporary mounting styles, and the rare intense bluish green color make this prasiolite an exceptional addition to a high end gemstone collection. With a hardness of seven on the Mohs scale quartz family stones are suitable for many types of jewelry, while still requiring sensible care to avoid abrasion and hard impacts. We recommend protective settings that shield the girdle and corners, such as a well designed bezel or prong configuration with secure settings, particularly if the gemstone will be worn frequently. Avoid exposure to high heat or prolonged intense direct sunlight, and clean gently with warm soapy water or a soft ultrasonic clean when necessary.

At The Natural Gemstone Company we prioritize transparent grading, full treatment disclosure, and accurate origin information, and we provide documentation upon request so collectors and jewelers can confirm the attributes described. This prasiolite represents a rare confluence of size, color rarity, and clean, well executed cutting and polish, making it a logical centerpiece for a connoisseur seeking a museum quality quartz example or a distinctive focal stone for bespoke jewelry. Its stability under wearable conditions when set and cared for appropriately, combined with its striking bluish green saturation, ensures it will stand out in any cabinet of fine gems while retaining clarity of provenance and treatment. Consider this gem as a refined acquisition that brings both visual drama and sound gemological credentials to a high end collection.