自由形态西瓜碧玺 • 2.10 克拉 • 珍稀圆形粉色核心 - 高度: 8 mm - 宽度: 8 mm- 0.42 g - (1)

DESCRIPTION:
This exceptional Watermelon Tourmaline slice from Minas Gerais immediately distinguishes itself through two unusual features rarely seen together: a nearly perfect circular central core and an irregular freeform outer geometry. Rather than following the more familiar triangular or shield like architecture of many tourmaline sections, this specimen presents a softer, naturally asymmetric silhouette, while the nucleus remains remarkably round and visually concentrated. The contrast between these two geometries gives the piece a highly individual identity.

At the centre lies a pale pink circular nucleus surrounded by a more saturated pink perimeter. This darker pink ring defines the core with remarkable clarity, creating the impression of a concentric target suspended within the crystal. The inner portion remains softer and lighter, while the outer pink boundary gives the nucleus strength and precision, making the circular structure immediately readable from the front.

Encircling the pink core is a pale whitish to slightly greyish transitional aura. This intermediary zone acts as a soft optical buffer between the warm central tones and the green exterior, increasing the perception of depth and reinforcing the concentric character of the slice. Under stronger illumination, this pale band becomes more luminous and allows the successive growth stages to emerge with greater clarity.

The dominant outer body develops in olive green to yellowish green tones, occupying most of the specimen and framing the circular nucleus. The green is broad, translucent and naturally variable, becoming brighter where light penetrates more efficiently. Along the sides, preserved prismatic surfaces retain fine longitudinal growth striations, while the irregular freeform outline records the original geometry of the crystal rather than presenting a conventional symmetrical section.

What makes this specimen especially collectible is precisely the relationship between rarity of form and rarity of zoning. The nearly circular core differs markedly from the more common angular internal zoning of tourmaline, while the freeform outer profile gives the specimen an additional sculptural quality. Together, the pale central nucleus, saturated pink ring, whitish transitional aura and broad green body create a distinctive natural architecture that is immediately recognisable and difficult to confuse with more conventional Watermelon Tourmaline material.

SPECIFICATIONS:
• Weight: 0.42 g
• Weight in carats: 2.10 ct
• Dimensions: 8 × 8 × 4.5 mm
• Origin: Minas Gerais, Brazil
• Mineral species: Tourmaline
• Variety: Watermelon Tourmaline
• Crystal system: Trigonal
• Form: Natural freeform crystal slice
• Outer geometry: Irregular freeform profile
• Core geometry: Nearly circular central nucleus
• Core structure: Pale pink centre surrounded by a stronger pink ring
• Transitional zone: Whitish to slightly greyish luminous aura
• Outer body: Olive green to yellowish green
• Colour zoning: Concentric zoning with circular central development
• Transparency: Translucent to locally transparent
• Lustre: Vitreous
• Surface features: Natural lateral growth striations and preserved prism faces
• Internal features: Fine crystallisation textures and concentric growth structures
• Treatment: None
• Condition: Natural, untreated crystal slice

NOTABLE POINTS:
• Rare nearly circular central core
The nucleus presents an unusually rounded geometry, distinctly different from the more common angular zoning seen in many tourmaline sections.

• Defined pink core architecture
A pale pink centre is enclosed by a more saturated pink ring, producing a strong and clearly readable concentric focal point.

• Luminous whitish transitional aura
A pale intermediate zone separates the pink nucleus from the green body and adds depth to the crystal’s internal architecture.

• Broad green outer body
The surrounding tourmaline develops in olive to yellowish green tones, creating a natural chromatic frame around the central structure.

• Unusual freeform outer geometry
The specimen does not follow the more familiar triangular or shield like silhouette, giving it a more sculptural and individual appearance.

• Strong contrast between inner and outer geometry
The circular core enclosed within an irregular freeform body creates a particularly distinctive visual composition.

• Preserved natural growth structure
The slice retains the crystal’s original internal zoning and external morphology without artificial reshaping.

• Visible lateral growth striations
Fine parallel lines remain preserved along the prism surfaces, confirming natural longitudinal development.

• Excellent transmitted light response
Backlighting increases the luminosity of the pale transitional zone and strengthens the separation between the pink and green colour domains.

• Vitreous reflective surfaces
Natural surfaces catch light effectively, increasing brilliance and enhancing the readability of the zoning.

• Minas Gerais provenance
The specimen originates from one of the world’s most important and historically recognised regions for coloured elbaite tourmaline.

• Strong collector identity
The combination of circular core zoning and freeform external geometry separates this specimen from more conventional Watermelon Tourmaline slices.

COLLECTOR’S INTEREST:
Watermelon Tourmalines with clearly organised zoning are already highly collectible, but this specimen gains particular distinction from the unusual geometry of its internal nucleus. The nearly circular core, stronger pink perimeter and pale transitional aura create a growth architecture that is visually different from the more familiar angular or triangular structures.

Its irregular freeform outline adds another layer of individuality, giving the slice a natural sculptural quality rather than a standard cross sectional appearance. The combination of these two characteristics gives the specimen a particularly recognisable collector profile.

LAPIDARY POTENTIAL:
Although the material offers attractive translucency and colour separation, any cutting or reshaping would destroy the circular nucleus, transitional aura and freeform geometry that define the specimen. Its greatest value therefore lies in preserving the slice exactly as it is, where its rare internal architecture and original crystal form remain fully visible.

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Photography and transparency:
All photos were taken under controlled light conditions, carefully selected to reproduce the most accurate natural color of each specimen. No filters, color enhancement, or artificial saturation were applied. The lighting setup is used exclusively to represent the piece as it appears under neutral daylight, ensuring that buyers can appreciate its true tones and luster without distortion.

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GemPulse Minerals