丰富的长刃 TANZANITE 水晶 • 2.30 克拉 • 二色性变化与非凡的强烈色彩 - 高度: 13.5 mm - 闊度: 5.5 mm- 0.46 g - (1)

DESCRIPTION:
This natural Tanzanite from Merelani Hills, Block D presents a beautifully elongated and well formed crystal structure, combining a slender upright profile with a compact and visually powerful presence. Its habit is elegant and highly readable, with a refined blade like prismatic development that gives the specimen a strong architectural identity while preserving the expressive charm of a natural crystal.

Its colour is one of its most captivating features. In standard illumination, the crystal displays a rich Midnight Blue that immediately conveys depth and nobility. When light passes more directly through the structure, violet and violet blue tones begin to emerge with remarkable beauty, revealing the pleochroic behaviour for which fine Tanzanite is so admired. This natural transition between deeper blue and luminous violet gives the specimen a dynamic personality, allowing it to reveal different moods according to orientation and lighting.

The crystal surfaces preserve a wealth of natural detail. Fine longitudinal growth striations are clearly visible along several faces, recording the crystal’s development and reinforcing its complete natural authenticity. These linear structures interact beautifully with the vitreous lustre, producing alternating zones of brightness, transparency and texture as the specimen is rotated.

Transparency is especially attractive in this crystal. Certain zones allow light to penetrate with notable intensity, creating luminous violet flashes and a soft internal glow, while the more saturated areas maintain the strong Midnight Blue character that defines the piece. This contrast between translucent brilliance and concentrated colour gives the crystal excellent visual depth and a strong three dimensional presence.

The specimen also benefits from a very harmonious overall form. It appears structured, compact and naturally balanced, with well defined vertical development and clear crystalline surfaces that give it an assured and elegant presentation. Rather than relying on colour alone, it captivates through the combined strength of colour, form, transparency and preserved growth features.

Originating from the celebrated Block D area of Merelani Hills, Tanzania, this Tanzanite is a highly expressive collector crystal that unites rich Midnight Blue saturation, beautiful violet response under transmitted light, strong pleochroic character and a graceful elongated morphology. It is a specimen that communicates both mineralogical quality and visual emotion with immediate impact.

SPECIFICATIONS:
• Weight: 0.46 g
• Weight in carats: 2.30 ct
• Dimensions: 13.5 × 5.5 × 4 mm
• Origin: Merelani Hills, Block D, Tanzania
• Mineral species: Zoisite
• Variety: Tanzanite
• Crystal system: Orthorhombic
• Crystal habit: Natural elongated blade like prismatic crystal
• Morphology: Slender upright crystal with compact and well formed structure
• Colour: Midnight Blue to violet blue
• Colour behaviour: Natural pleochroic variation between deep blue and violet
• Transparency: Transparent to translucent
• Lustre: Vitreous
• Surface features: Fine longitudinal growth striations and preserved natural crystal faces
• Internal structure: Natural growth textures and colour zoning
• Treatment: None
• Condition: Natural, unpolished crystal

NOTABLE POINTS:
• Rich Midnight Blue colour
The crystal shows an intense and elegant blue that gives the specimen immediate visual strength.

• Beautiful violet response under light
When illuminated from behind or through thinner sections, attractive violet and violet blue tones become clearly visible.

• Pronounced pleochroic behaviour
The specimen reveals different chromatic expressions depending on orientation and lighting, one of the most desirable characteristics of Tanzanite.

• Slender and well formed morphology
Its upright elongated structure gives the crystal a graceful and highly recognisable natural silhouette.

• Strong natural crystal architecture
The specimen presents a compact yet expressive form with clear vertical development and excellent visual balance.

• Fine longitudinal growth striations
Natural linear growth features are visible across several surfaces, documenting the crystal’s formation history.

• Attractive transparency
Light penetrates effectively through multiple areas, enhancing colour and creating a luminous internal character.

• Excellent vitreous lustre
The surfaces respond brightly to illumination, adding brilliance and definition to the crystal’s morphology.

• Subtle internal colour zoning
Variations between deeper blue and lighter violet blue areas contribute depth and natural complexity.

• Preserved natural crystal faces
Several well defined faces remain visible, reinforcing both authenticity and collector interest.

• Premium Block D provenance
The specimen comes from one of the most respected localities within the Merelani Hills Tanzanite deposit.

• Strong display appeal
Its combination of colour, transparency and elegant vertical habit creates a crystal with excellent presentation value.

COLLECTOR’S INTEREST:
Collectors are especially drawn to Tanzanite crystals that combine strong pleochroic colour behaviour with a clear and elegant natural habit. This specimen stands out precisely because it offers both. Its rich Midnight Blue body colour gives it immediate gravitas, while the emergence of violet under transmitted light brings additional life, sophistication and visual drama.

Its elongated and well structured form further enhances its desirability, offering a crystal that is easy to appreciate from multiple angles. The preserved growth striations, natural faces and harmonious proportions give the specimen a strong mineralogical identity while maintaining the emotional appeal that makes Tanzanite so compelling to collectors.

For those seeking a natural Merelani crystal with expressive colour, authentic structure and excellent display presence, this specimen offers a particularly rewarding combination of beauty, character and provenance.

LAPIDARY POTENTIAL:
The crystal contains areas of attractive transparency and excellent blue violet colour that could invite lapidary consideration. Its pleochroic behaviour would also offer interesting possibilities for orientation in any cutting project.

Even so, the specimen’s principal value lies in its natural crystal form, preserved longitudinal growth features and the elegant relationship between Midnight Blue saturation and violet transmitted light response. In its present state, it stands as a complete and highly appealing collector specimen, where its natural beauty and geological history remain fully intact.

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All orders are shipped by Portuguese National Post.
• Dispatch time: within 1 to 3 business days after payment confirmation to Catawiki
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Photography and transparency:
All photographs are taken under controlled lighting conditions using a macro lens, carefully selected to present each specimen as accurately as possible.
No filters, colour enhancement, or artificial saturation are applied.
The lighting setup uses a calibrated 5500K light source, replicating neutral daylight to reveal natural tones, surface features, and internal characteristics. Under warmer or weaker indoor lighting, colours may appear slightly different, which is normal.
The purpose of this photographic process is documentation and representation, not visual enhancement. Images are intended to reflect the specimen faithfully as it appears under balanced natural light conditions.

Identification and ethics:
All specimens offered are natural and described to the best of our knowledge, based on direct sourcing, professional experience, and information provided by trusted suppliers working at the origin.
Every effort is made to ensure transparency and accuracy regarding identification, locality, and general characteristics, avoiding misleading statements about treatment, provenance, or nature.

Customs and import taxes:
Any customs duties, import fees, or local taxes applied by the destination country are entirely the responsibility of the winning bidder.
These charges are not included in the auction price or shipping cost and are determined by the buyer’s local authorities.

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Each case is handled individually and fairly, with appropriate solutions offered when justified.

Appreciation and commitment:
We sincerely thank you for your trust. Our work focuses on careful selection, accurate representation, and respectful presentation of mineral specimens with character and interest.
Each piece is chosen for its individual qualities rather than speculative or financial considerations. We aim to provide a transparent, reliable, and consistent experience for collectors at all levels.

With gratitude,
GemPulse Minerals