複数のキュービック・イエロー・ダイヤモンド • リザーブ価格なし • 世界に一つだけのジオメトリ - Height: 4 mm - Width: 4 mm- 0.07 g - (1)

DESCRIPTION:
この特別な天然イエロー・ダイヤモンドの決定的な特徴は、卓越した相互成長する立方晶の構造です。単一の立方晶結晶として現れるのではなく、形成過程で一体となって発育し、結晶学的に融合したいくつかの立方体の成長ユニットの自然な組み合わせとして見えます。表面は重なり合い、交差し、互いに連続しており、複数の幾何学的ブロックが一つの結晶へと組み合わさっている印象を作り出します。こうした相互成長は、近縁の結晶学的指向に沿った連続的または同時発育から生じ、ダイヤモンド固有の立方晶言語を保ちながら、異常に複雑な三次元構造を生み出します。

あらゆる角度からは、これらの幾何学的ユニットの異なる配置が見えるようになります。大きめの正方形・長方形の面が、小さな階段状の形成の間に現れ、隣接する成長面は層状の構造を作り出し、非常に秩序立って視覚的に緻密です。結晶は回転によって大きく変化し、自然の表面同士の新たな交差点や関係が現れ、一方の優勢な形態を繰り返すことはありません。

色は豊かな天然黄で、晶体全体に広がり、通常の照明下でも暖かく光り輝く外観を呈します。背面から強い光を当てると、色は劇的に鮮やかなネオンイエローへと増強され、標本を一変させ、重なり合う結晶構造を内側から照らします。

表面は極めて魅力的な天然の質感を保っています。立方体の多くの面には細かな成長起伏が覆いかぶさり、無数の微小な反射を生み出します。一方で広い平面は結晶の幾何学をすぐに読み取れるだけの定義を保っています。ダイヤモンド特有の金剛光沢と相まって、質感・反射・色のエネルギッシュな相互作用を生み出します。

本標本が特に魅力的なのは、数学的な幾何学と自然の複雑さとの調和です。個々の立方成長ユニットは視覚的に識別可能なままですが、一本の統一的な結晶に間違いなく属しており、地質的に完全に起源であるにもかかわらず、まるで作られたかのような形をしている点です。

originating from the Marange Diamond Fields, Manicaland Province, Zimbabwe, this untreated rough diamond combines an extraordinary intergrown cubic habit, intense natural yellow colour and dramatic Neon Yellow response under transmitted illumination. It is a striking example of how diamond crystallisation can produce architecture every bit as fascinating as colour itself.

SPECIFICATIONS:
• Weight: 0.07 g
• Weight in carats: 0.35 ct
• Dimensions: 4 × 4 × 4 mm
• Origin: Marange Diamond Fields, Manicaland Province, Zimbabwe
• Gem material: Natural Diamond
• Crystal system: Cubic
• Form: Natural rough diamond
• Morphology: Complex intergrown cubic crystal
• Growth architecture: Multiple naturally fused cubic growth units
• Colour: Natural Yellow
• Colour response: Intensifies to vivid almost Neon Yellow under transmitted light
• Colour distribution: Predominantly uniform with subtle tonal variation between growth units
• Transparency: Translucent
• Lustre: Adamantine
• Surface features: Natural cubic faces with fine growth relief and stepped textures
• Treatment: None
• Condition: Natural, unpolished and untreated

NOTABLE POINTS:
• Extraordinary Intergrown Cubic Architecture
Several cube like growth units developed together and became naturally fused into one highly complex crystal.
• Clearly Readable Cubic Geometry
Square and rectangular natural faces remain identifiable throughout the specimen despite the overlapping growth.
• Exceptional Three Dimensional Structure
Each rotation reveals a different relationship between the individual crystallographic units.
• Rich Natural Yellow Colour
The crystal displays a warm and highly visible yellow body colour across its structure.
• Near Neon Response Under Backlighting
Transmitted illumination dramatically intensifies the yellow into an exceptionally vivid luminous tone.
• Natural Stepped Growth Features
Successive crystallisation stages remain preserved across several surfaces.
• Strong Adamantine Lustre
Natural faces produce bright reflective flashes that emphasise both colour and geometry.
• Complex Surface Relief
Fine natural textures create a dense field of reflections without obscuring the principal cubic architecture.
• Completely Natural Rough State
Its colour, morphology and growth structure remain unaltered by cutting or polishing.
• Marange Provenance
Originates from the Marange Diamond Fields of Manicaland Province, Zimbabwe.

COLLECTOR’S INTEREST:
Natural coloured diamonds are already highly desirable, but specimens whose crystallography becomes a central visual feature occupy a particularly compelling position. Here, the naturally fused cubic growth units create an architecture that can be appreciated simultaneously as mineralogy and natural sculpture, with each viewing angle revealing a different arrangement of geometric planes.

The vivid yellow colour and dramatic almost Neon Yellow response under transmitted light add another dimension to that structure. For collectors seeking rough diamonds with unmistakable individuality, the combination of colour, cubic intergrowth and preserved natural growth surfaces gives this specimen a very strong identity.

LAPIDARY POTENTIAL:
Although the material could theoretically be considered for cutting, doing so would permanently destroy the intergrown cubic architecture that defines the specimen. Its strongest value lies in preservation as a complete natural crystal, where the fused growth units, yellow colour and remarkable geometric structure can all be appreciated together.

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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.

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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