Investment natural tanzanite, 2.97 carats, trilliant cut, bluish violet color, certified gemstone from Tanzania

Investment Tanzanite 2.97 ct – Trilliant Cut, Certified Natural Tanzanite

Name: Investment Tanzanite 2.97 ct – Trilliant Cut, Certified Natural Tanzanite
Brand: SOSNA Gems & Jewellery
SKU: CGL2201409
Price: 45079.00 CZK
Availability: InStock

45.079,00 CZK

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Gemstone Specification

Carat Weight 2.97

Dimensions 10.15 x 9.64 x 5.33 mm

Color Bluish Violet

Clarity Eye Clean

Shape Trilliant

Treatment Standart Heat Treatment

Origin Tanzania

Certification Czech Gemological Laboratory (EU)

This exceptional natural tanzanite weighs 2.97 carats and displays a highly desirable bluish violet coloration with vivid brilliance and excellent transparency. Expertly fashioned in a striking trilliant cut measuring 10.15 × 9.64 × 5.33 mm, the gemstone offers impressive face-up size, strong light return, and a modern collector-oriented appearance. The combination of near 3-carat weight and vibrant blue-violet saturation places this gemstone within a highly attractive category for gemstone collectors and investment-focused buyers.

Tanzanite is one of the rarest gemstones in the world and is mined exclusively in a single locality near Mount Kilimanjaro in Tanzania. Due to the finite supply and increasing global demand for fine-quality material, premium tanzanites continue to gain recognition as highly collectible gemstones with strong long-term desirability.

Certified by the Czech Gemological Laboratory (ČGL), this gemstone has been identified as natural tanzanite (zoisite). Standard heat treatment, commonly accepted within the gemstone industry, has been applied to enhance the gemstone’s naturally vibrant bluish violet coloration. The elegant trilliant cut further increases its rarity and visual impact, making it especially suitable for luxury investment jewelry and advanced gemstone collections.

Its impressive size, rare collector color, and certified natural origin make this tanzanite an outstanding acquisition for collectors, investors, and bespoke high-end jewelry creations.

Investment Tanzanite 2.97 ct – Trilliant Cut, Certified Natural Tanzanite

45.079,00 CZK

From gemstone to jewelry

This example illustrates one possible way a gemstone may be developed into a bespoke piece. Final design is always defined individually, based on the stone and its natural character.

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Gemological overview

Technical and gemological information about this gemstone variety.

Gemological profile

Tanzanite is a blue to violet-blue variety of the mineral zoisite, valued for its rich coloration and distinct pleochroism, which can display different hues depending on viewing angle and lighting conditions. In gem-quality material, tanzanite is appreciated for its depth of color and refined visual character, particularly in well-cut stones.
Chemically composed of calcium aluminum silicate (Ca₂Al₃(SiO₄)₃(OH)), tanzanite crystallizes in the orthorhombic crystal system and belongs to the silicate mineral group. Transparent gem-quality specimens typically display a vitreous luster with good clarity.
The refractive index of tanzanite generally ranges from approximately 1.69 to 1.70, contributing to a balanced brilliance rather than intense sparkle. Tanzanite is found exclusively in a single geographic area near Mount Kilimanjaro in Tanzania, a factor that contributes to its distinct identity among colored gemstones.

Durability & suitability

With a hardness of approximately 6 to 6.5 on the Mohs scale, tanzanite offers moderate durability suitable for jewelry when properly set and worn with care. While it can be used in a range of designs, it performs best in pieces that are less exposed to frequent impact, such as pendants, earrings, and protected ring settings.
Due to its moderate hardness and cleavage, thoughtful setting design is particularly important, especially for rings intended for regular wear. Tanzanite’s combination of color depth and elegance makes it especially well suited for refined, occasional-wear jewelry and expressive statement designs.

Treatments & authenticity

Tanzanite is commonly heat treated to enhance its blue and violet coloration, a practice that is standard within the gem trade and considered permanent and stable when properly disclosed. This treatment does not compromise the structural integrity of the gemstone.
Any treatments or enhancements are always clearly stated for each individual gemstone. Every stone is professionally examined, and transparent disclosure is regarded as a fundamental part of responsible gemological practice, allowing clients to make informed and confident decisions.

Our approach to gemstones

We focus primarily on natural, untreated gemstones, valued for their authenticity and inherent beauty.
Any treatments or enhancements are always clearly disclosed, allowing our clients to make informed decisions based on transparent gemological standards.

Sosna Gems is not a licensed financial advisor. Gemstones are collectibles, not securities. Past performance is not indicative of future results. Legal & risk disclosure .