1.82 Ct. Bluish Green Paraiba Tourmaline from Brazil

This Paraiba tourmaline, sourced from Brazil and presented by The Natural Gemstone Company, is a transparent oval weighing 1.82 carats, with precise dimensions of 9.31 by 6.38 by 4.74 millimeters. The gem is faceted in a mixed brilliant style, combining a brilliant crown with a more structured pavilion geometry, and it has been evaluated as very very slightly included at eye level. Color intensity is graded as medium, and the surface presents an excellent polish. The stone has undergone careful heat treatment to stabilize and even out its bluish green tone, and the overall package reflects deliberate choices in cutting and finishing to maximize optical performance and visual appeal.

At the core of this gem is the elbaite species of tourmaline, a crystal structure that inherently favors vivid light performance. The trigonal lattice and channels within the structure can accommodate copper and manganese, elements that produce the distinctive bluish green hue associated with Paraiba material from Brazil. These constituent elements influence selective absorption bands in the visible spectrum, which in turn enhance apparent saturation and vibrancy when light is returned through the crown facets. Tourmaline also exhibits pronounced pleochroism, meaning that light viewed from different directions reveals slightly different tones, a property that gives moving flashes of color and depth when the gem is set into jewelry. The material’s refractive behavior promotes internal reflection and scintillation, while the limited birefringence of elbaite ensures that those flashes remain coherent and lively rather than dispersed into excessive double images, a balance that supports a controlled and intense sparkle.

The mixed brilliant cut of this oval plays a decisive role in converting the stone’s structural advantages into visible brilliance. The cutting plan uses a brilliant crown to create numerous fine facets that scatter incoming light into compact, high contrast scintillation, while a more step oriented pavilion geometry deepens color and channels light back through the crown in broader, colorful flashes. The gem’s depth of 4.74 millimeters corresponds to approximately sixty percent of its average diameter, a proportion that yields an efficient balance between return of light and saturation of color. The excellent polish and precision facet junctions further reduce light leakage, so more photons are redirected toward the viewer rather than lost through imperfect surfaces. The very very slightly included clarity grade means internal interruptions are minimal and strategically located, allowing uninterrupted pathways for light to reflect and refract, resulting in concentrated pinfire brilliance and broad flashes that are noticeably more pronounced than in many other gemstones of similar tone and size.

Practical considerations also reinforce the gem’s optical performance in finished jewelry. The 1.82 carat weight and oval outline provide a generous table and a readable surface that lets the stone’s internal play of light be easily appreciated, while the durable nature of tourmaline, with adequate hardness for many types of fine jewelry when handled with appropriate care, supports regular wear. The heat treatment applied to this Paraiba tourmaline is a stable enhancement commonly used to homogenize color and minimize localized zones of diffusion, allowing the natural copper related tones to present uniformly across the faceted surface. For settings, designs that allow light to enter through the pavilion and reflect back through the crown, such as open prong or basket styles, will preserve and amplify the stone’s intrinsic spark, as will orientations that take advantage of the material’s pleochroic axes. The Natural Gemstone Company confirms the Brazilian origin, the cutting and finishing specifications, and the evaluated clarity and color grades, providing a transparent technical profile for this exceptional bluish green Paraiba tourmaline.