6.59 Ct. Bluish Green Prasiolite from Brazil

This prasiolite is a transparent bluish green gem weighing 6.59 carats, presented in a classic round shape with precise dimensions of 12.20 by 12.25 by 7.99 millimeters, faceted to a mixed brilliant cutting scheme that balances sparkle and color depth. At The Natural Gemstone Company we describe its color as medium intensity, a richly saturated bluish green that remains lively under natural and artificial lighting, and its clarity grade is eye clean when evaluated at eye level, indicating no inclusions visible to the unaided eye and offering a visually pure window into the crystal. The stone benefits from an excellent polish, each facet meeting crisply and reflecting light with clean return, and the proportions place the pavilion depth at approximately sixty five percent of the diameter which is a pleasing proportion for colored quartz, creating a desirable interplay between light return and color saturation. The material has been heat treated to produce and stabilize the attractive green hue, a standard and widely accepted enhancement for prasiolite sourced from Brazil, and this disclosure is provided openly as part of our commitment to transparent grading and accurate representation.

From a gemological perspective this piece is compelling for an educated buyer because it combines meaningful carat weight, superior clarity to the naked eye, and a skilled mixed brilliant cut that maximizes scintillation in a gem species with modest dispersion. Quartz has a Mohs hardness of seven which offers everyday durability, and because prasiolite shows relatively low fire, the apparent beauty depends more on color, cut symmetry, and surface finish, all of which are strengths for this stone. The eye clean clarity enhances brightness, and the excellent polish reduces light leakage, so the stone returns color and brilliance efficiently despite the low dispersion of quartz. Heat treatment is a stable enhancement under normal wear and cleaning conditions, though as a best practice we advise cleaning with warm soapy water and a soft brush, avoiding prolonged exposure to high salon grade temperatures or steam that could affect the integrity of any heat treated color, and we note that standard jewelry settings in gold or platinum will protect the stone while allowing its bluish green tone to be showcased. For setting suggestions this carat weight and diameter typically makes a bold and elegant center for rings, solitaire pendants, or cocktail pieces, and the balanced round form lends itself to a wide range of design styles.

The journey of this prasiolite from its Brazilian source to your collection illustrates the confluence of geology, skilled craftsmanship, and responsible trade practices that we uphold at The Natural Gemstone Company. Mined from quartz bearing veins in Brazil where green quartz material forms either naturally or through treatment of suitable amethyst rough, the sight of rough pieces arriving from small scale Brazilian operations initiates a process of careful selection. Rough that exhibits the potential for even color distribution and internal clarity is reserved, then cut planning is executed by experienced lapidaries who choose a mixed brilliant pattern to retain weight while maximizing visual appeal. Each step from sawing and preforming to faceting and final polishing is monitored for symmetry and light performance, and then the finished gem is evaluated under controlled lighting at eye level for clarity grading and by trained graders for color intensity and polish quality. We document the enhancement through heat treatment, record the measurements and carat weight, and subject the finished gem to final quality control and photography before it is offered to clients. The result is a notable 6.59 carat, round prasiolite that combines Brazilian origin, transparent clarity, refined cutting, and ethical handling, presented with full disclosure and ready to be set into a lasting piece of jewelry. If you have further technical questions about proportions, setting recommendations, or sourcing details, The Natural Gemstone Company is available to provide precise measurements, additional images, and guidance tailored to your design and collecting priorities.