About the item: An authentic, exceptional GEM-quality natural rough tanzanite crystal – a rare mineralogical specimen characterized by striking pleochroism and clarity. Originating from the world's only deposit of this mineral in Tanzania, this 2.66-carat crystal displays a rich, luminous blue-violet color. The stone retains a compact, well-balanced natural form with well-defined edges that effectively refract and reflect light. Valued for both its lapidary potential and its collectible worth, this tanzanite represents the highest echelon of rough crystals.
Technical Information:
Height: 7.7 mm
Width: 7.7 mm
Depth: 4.5 mm
Weight: 0.53 g (2.66 carats)
Origin: Tanzania Mineral Type: Tanzanite (blue variety of zoisite)
Condition: Natural rough crystal (Cristal brut naturel)
Treatments: Heated – a standard, universally accepted practice for color stabilization
Artistic and Structural Analysis: This specimen features a uniformly saturated, luminescent blue-violet color dominated by rich blue tones intertwined with elegant violet hues. The primary gemological distinction of this crystal is its strongly pronounced optical phenomenon of pleochroism, causing the colors to shift depending on the viewing angle: deep blue dominates on some axes, while softer lilac and violet reflections appear on others. The crystal boasts a very high level of clarity with no cloudy or milky zones, keeping its internal structure completely "readable" – minute natural inclusions are minimal and do not obstruct light dispersion, giving the stone additional depth.
Geological and Geographical Context: Tanzanite is one of the rarest and most coveted gemstones in the world, geologically discovered only in 1967 in the Merelani Hills of northern Tanzania, near Mount Kilimanjaro. This is the only known locality for this mineral on Earth, making its resources extremely limited. Scientifically, tanzanite is a vanadium-rich variety of zoisite, which often exhibits brown or gray tints in its natural environment. Only through standard heat treatment (heating), which mimics natural geological processes, is this deep, royal blue-violet palette brought forth and permanently stabilized, enhanced without compromising the stone's authenticity, but rather revealing its true gemological beauty.
Collectible and Investment Value: The market value of this tanzanite crystal is defined by several essential aspects. First and foremost is its premium GEM quality, guaranteeing an impeccable balance of clarity and color saturation rarely found in rough crystals. Also highly valuable is its excellent jewelry potential, as its compact and proportional cubic shape makes the stone ideal for faceting to achieve maximum color concentration with minimal weight loss. Its enduring collectible appeal adds further value, as a well-formed raw crystal with natural edges is a highly sought-after prize for elite mineralogical collections. Finally, the object boasts investment security, as the global tanzanite market remains one of the most stable due to steadily diminishing primary reserves.
This 2.66-carat creation from the depths of Tanzania is a harmonious blend of natural aesthetics and spectacular optical properties, ensuring solid long-term value retention and exceptional visual pleasure.
