1.88 Ct. Green Tourmaline from Tanzania

This offering from The Natural Gemstone Company is a transparent green tourmaline weighing 1.88 carat, presented in a radiant shape. The stone measures 6.85 x 6.63 x 5.39 mm, and it has been faceted to a radiant cut that balances brilliance with a broad display of color. The clarity is described as very very slightly included, evaluated at eye level, and the stone displays intense color saturation with an excellent polish. No enhancement has been applied to this material, and its stated origin is Tanzania. These objective specifications establish the basic physical profile and confirm the stone as a natural, untreated example of green tourmaline suitable for use as a centerpiece in fine jewelry.

The internal character of this tourmaline provides an unmistakable signature, composed of a combination of inclusion types that are consistent with naturally formed tourmalines. Under magnification the stone reveals a network of fine acicular inclusions, oriented along growth directions, along with isolated, transparent mineral crystals and minute two phase inclusions that contain a tiny vapor bubble within a liquid pocket. These features occur in such a way that they thread through certain pavilion facets, creating linear highlights that are visible only under loupe or microscope. There are also subtle growth zoning patterns that follow the crystal habit, producing faint banding in the greener and slightly yellowish green tones when viewed at different angles. The inclusions are minute enough to remain essentially invisible to the naked eye, which is consistent with the very very slightly included designation when examined at eye level. Importantly, these internal features are natural, and they corroborate the absence of enhancement, since treatments that alter clarity typically leave characteristic residues or altered inclusion morphology that are not present here.

The radiant cut and excellent polish work in concert with the stone s internal features to produce a lively, three dimensional appearance. The radiant cut employs a mixed facet arrangement that both disperses light and concentrates color, which is particularly effective with tourmaline because of its pleochroic behavior. As the stone is rotated, the viewer notes subtle shifts between deeper forest green and lighter yellow green hues, a consequence of directional absorption within the crystal lattice. The fine acicular inclusions and the two phase pockets interact with light in a restrained manner, producing delicate internal reflections that contribute to the sense of depth without interfering with overall transparency. Because the inclusions are so small, they do not compromise the structural integrity of the gem, and the excellent polish ensures that surface reflections remain crisp, maximizing apparent clarity and color saturation. The result is a gem that reads as clean and vivid to the unaided eye, while preserving the microscopic evidence of natural growth that many collectors and connoisseurs value.

For practical considerations, this 1.88 carat Tanzanian tourmaline is well suited for a range of jewelry settings, including solitaire rings, pendants, and custom designs where its intense green color can be showcased. Tourmaline has a Mohs hardness of approximately seven to seven and a half, which makes it durable for everyday wear when set responsibly, but the stone should be protected from hard knocks and sharp blows. Cleaning with warm water, mild detergent and a soft brush is advisable, while steam cleaning and harsh ultrasonic treatments are not recommended for untreated tourmaline. When assessing natural gemstones, buyers often value internal features that confirm origin and natural formation, and the internal fingerprint of this stone is coherent with its Tanzanian provenance. The Natural Gemstone Company provides full disclosure on treatment and origin, and this piece is presented as a natural, untreated example with documented physical and optical characteristics, suitable for clients seeking a transparent, intensely colored green tourmaline with a distinctive natural signature.