4.79 Ct. Bluish Green Prasiolite from Brazil

This prasiolite is a transparent, oval shape gemstone weighing 4.79 carat, with exact dimensions of 11.96 by 10.18 by 7.12 mm. The cutting style is faceted with a mixed brilliant cut designed to maximize light return in the pavilion and crown, producing a lively combination of sparkle and scintillation. Color is a bluish green with intense saturation, presented with an eye clean clarity grade as evaluated at normal viewing distance. Surface quality is of a high standard with an excellent polish, and the piece has been enhanced by irradiation to achieve its characteristic green tone. The material is of Brazilian origin and is offered with full disclosure of its treatment history by The Natural Gemstone Company.

Prasiolite is a variety of quartz known for its green coloration and for the rarity of naturally occurring specimens. Natural green quartz is uncommon in the gem market, and many commercially available prasiolites achieve their color through controlled treatments such as irradiation, which is the case for this stone. Irradiation is an industry accepted enhancement that alters crystal lattice electrons to produce stable color under normal wear conditions. Following irradiation, proper cutting and polishing are applied to reveal the stone’s optical potential. The oval outline and mixed brilliant faceting of this example provide efficient light performance while preserving weight, making it suitable for a range of jewelry applications. With a hardness of approximately 7 on the Mohs scale, prasiolite offers reasonable durability for regular wear, though caution is advised to avoid sustained exposure to high heat and harsh chemical agents that can affect color stability in treated stones.

When compared to lab grown gemstones, natural prasiolite presents several distinguishing attributes. Lab grown stones often replicate the chemical and optical properties of natural minerals with high consistency in color and clarity, and they offer predictable supply and cost efficiencies. Natural gemstones, by contrast, carry the imprint of geological formation processes that span millions of years, which creates unique internal features and trace element signatures that can be detected and documented. These natural characteristics contribute to the individuality and provenance of each piece, and for many buyers and collectors they are a key aspect of value. The origin from Brazil provides a verifiable geographic context, and subtle variations in hue and internal structure are evidence of natural formation rather than synthetic manufacture. In addition, natural stones that have been responsibly sourced and fully disclosed, as we provide at The Natural Gemstone Company, can meet high ethical standards while retaining the intrinsic qualities that differentiate them from laboratory produced equivalents.

Practical considerations for this prasiolite include setting choices and care recommendations. The oval mixed brilliant cut makes the gemstone adaptable to ring, pendant, or earring settings, where its 11.96 by 10.18 by 7.12 mm proportions balance presence and wearability. Designers often pair prasiolite with neutral white diamonds or warm yellow metals to enhance its bluish green tone, or with complementary colored gemstones for contrast. Cleaning is best accomplished with mild detergent and warm water using a soft brush, avoiding steam cleaning and ultrasonic methods that may affect a treated stone. The Natural Gemstone Company documents the irradiated enhancement and Brazilian origin of this specimen, and we maintain detailed records to support provenance and transparency. The combination of a substantial 4.79 carat weight, intense bluish green color, eye clean clarity, excellent polish, and a precision mixed brilliant faceting make this prasiolite a refined natural offering for those seeking a distinct, verifiable gemstone with geological provenance and enduring visual appeal.