10.50 Ct. Green Prasiolite from Brazil

This exceptional prasiolite from The Natural Gemstone Company is a beautiful transparent 10.50 carat emerald cut gemstone with dimensions of 13.61 by 12.33 by 9.79 mm, faceted to maximize tone and clarity. The cutting style is a classic emerald cut, which employs broad step facets and a generous table to create a calm, elegant interplay of light that emphasizes the stone color and internal clarity. The clarity grade is very very slightly included evaluated at eye level, which means that under normal viewing conditions the stone reads as eye clean while retaining natural internal character that confirms its natural origin prior to enhancement. The color intensity is described as intense, and the gem exhibits a vivid, saturated green that is both deep and fresh in appearance, enhanced by a meticulous polish that yields crisp facet junctions and a smooth, reflective surface. This prasiolite has been heat treated, a standard and stable enhancement for quartz that converts pale or violet tones into rich green hues, and its country of origin is Brazil, a region renowned for high quality quartz crystals and skilled lapidary work.

From a gemological perspective this prasiolite presents an attractive balance of optical properties. As a member of the quartz family it has a refractive index near 1.54 and a relatively low birefringence, which translates into a lustrous vitreous sheen and clear, broad flashes of light rather than the intense spectral fire associated with higher refractive index stones. The emerald cut chosen for this piece accentuates its internal clarity by creating large, mirror like facet planes that reflect the saturated green color back to the viewer, producing a luxurious, coherent color field. Compared to green tourmalines and emeralds this prasiolite will display less dispersion and therefore less fire, but it compensates with superior color uniformity and a cleaner, more transparent appearance at this carat weight. Where many tourmalines show strong pleochroism that can shift color under different orientations, and where emeralds often contain more visible inclusions that contribute to their character, this prasiolite reads as consistently green from multiple angles, making it ideal for jewelry settings that favor color stability and a modern, geometric aesthetic.

Collectors and informed buyers will appreciate why this particular stone stands out in its category. At 10.50 carats and with the substantial dimensions provided, the gem offers presence and wearable scale while maintaining practical depth for secure settings. The very very slightly included clarity grade evaluated at eye level means that under normal inspection the gem appears virtually free of interruptions to light transmission, delivering a crisp and lively visual performance when set in rings or pendants. Heat treatment is a widely accepted practice for prasiolite originating from Brazil, and when executed correctly it provides a stable, permanent enhancement that improves both the hue and saturation without compromising structural integrity. In terms of comparative value, prasiolite typically offers a cost to carat advantage relative to gem materials that exhibit higher dispersion or greater rarity, yet this example presents a rare combination of intense color, excellent polish, and an elegant emerald cut, attributes that appeal to educated buyers seeking a balance of beauty and sensible investment. The Natural Gemstone Company stands behind the provenance and craftsmanship of this stone, and we welcome requests for additional photographs or faceted performance notes to support professional assessment and design planning.