彩色西瓜电气石 • 1.35 克拉 • 午夜蓝帽顶 & 红偏粉色核心 - 高度: 7 mm - 宽度: 5 mm- 0.27 g - (1)

DESCRIPTION:
A rose coloured heart, a cool blue body and a crown of midnight. This multicoloured tourmaline unfolds through a succession of contrasting hues, revealing a different part of its character as the eye travels from the lower core to the dark terminal cap.

The lower portion holds a particularly appealing detail: a reddish pink inner zone visible through a much paler surrounding body. Its colour appears suspended within the crystal, framed by near colourless and delicate mint tones that allow the warmer centre to remain distinct. This relationship between the pink interior and cooler outer material gives the specimen its watermelon character, while adding depth beyond a simple sequence of horizontal colour bands.

Above this pale lower region, the colour develops into a richer blue green. Aqua and teal impressions mingle with emerald green nuances, their relative prominence changing between the photographed perspectives. Transparent passages and reflective internal planes give this section a layered appearance, allowing the eye to explore both the colour and the structures within it.

Closer to the top, concentrated Royal Blue flashes provide a vivid transition into the Midnight Blue cap. These brighter blue accents are particularly striking against the surrounding teal, while the terminal band forms a sharply contrasting crown. Under stronger reflections, the dark cap also shows subtle violet blue nuances along its edges.

The crystal’s surface adds another dimension to this colour arrangement. Fine longitudinal striations run down the prism, crossing the visible horizontal transitions within the body. Broad reflective faces contrast with more intricate textured areas, and the irregular side profile reveals contours that differ from one perspective to another. The broad terminal face carries a finely textured, sparkling surface above the dark blue band.

From the Pederneira Mine in Minas Gerais, this specimen brings together a remarkable visual sequence: a reddish pink core, pale mint and near colourless passages, a blue green upper body, vivid Royal Blue accents and a Midnight Blue crown. Its strongest appeal lies in how these details coexist within one crystal, each colour giving definition to the next.

SPECIFICATIONS:
• Weight: 0.27 g
• Weight in carats: 1.35 ct
• Dimensions: 7 × 5 × 4 mm
• Origin: Pederneira Mine, São José da Safira, Minas Gerais, Brazil
• Mineral group: Tourmaline
• Variety: Multicoloured tourmaline with watermelon zoning
• Crystal system: Trigonal
• Crystal habit: Prismatic crystal with longitudinal striations
• Termination: Broad, approximately flat terminal face with a finely textured surface
• Lower core colour: Reddish pink, visible through the pale surrounding material
• Lower outer colour: Near colourless to pale mint green
• Upper body colour: Aqua to teal blue with emerald green nuances
• Upper colour accents: Concentrated Royal Blue flashes immediately beneath the terminal cap
• Terminal cap colour: Midnight Blue with violet blue nuances under reflected light
• Colour distribution: Internal pink core combined with successive pale, blue green and dark blue regions along the prism
• Transparency: Transparent to translucent, varying across the colour zones and internal structures
• Lustre: Vitreous
• Surface features: Fine vertical striations, textured areas, irregular lateral contours and a sparkling terminal surface
• Internal features: Reflective planes, fine inclusions and visible colour boundaries
• Hardness: 7 to 7.5 on the Mohs scale

NOTABLE POINTS:
• Reddish pink inner core
A warm coloured centre is visible in the lower portion, giving the specimen an intimate focal point within the crystal.

• Watermelon colour relationship
The pink interior contrasts with the cooler surrounding material, introducing colour depth as well as vertical zoning.

• Pale mint framework
Delicate mint and near colourless areas frame the lower core and separate it visually from the stronger colours above.

• Blue green upper body
Aqua and teal tones combine with emerald green nuances across the upper section of the prism.

• Royal Blue accents
Concentrated bright blue flashes appear close to the cap, adding a vivid intermediate colour to the sequence.

• Midnight Blue crown
A dark terminal band provides a striking visual boundary above the lighter, more transparent body.

• Complex colour arrangement
An internal core and successive vertical colour regions give the specimen interest in more than one dimension.

• Broad terminal face
The approximately flat top gives the dark cap a defined silhouette and a strong architectural presence.

• Sparkling terminal texture
Fine surface details catch the light across the top, contrasting with the depth of the blue band below.

• Longitudinal prism striations
Vertical lines run through the changing colour regions, linking the different sections within a continuous crystal form.

• Revealing internal structures
Transparent passages and reflective planes offer changing views of the crystal’s colour and interior detail.

• Pederneira Mine provenance
The supplied locality connects the specimen with a Brazilian mine celebrated for its tourmaline crystals.

COLLECTOR’S INTEREST:
This specimen offers several distinct attractions within a single colour composition. The lower reddish pink core provides the watermelon element, while the blue green upper body and Midnight Blue cap introduce a separate vertical progression. Together, these features make the crystal especially engaging for collectors interested in complex tourmaline zoning.

The Royal Blue accents immediately beneath the cap deserve particular attention. They create a vivid interval between the teal body and dark terminal band, giving the upper portion greater colour complexity than a simple contrast between a pale prism and a dark top. The broad termination and its sparkling texture complete this arrangement with a recognisable crown.

The different photographed perspectives reveal complementary aspects of the specimen. Some show the longitudinal striations and colour boundaries more clearly, while others expose the pink core and the intricate internal planes. Light passing through the crystal helps reveal these relationships; under softer reflected illumination, the deeper blue regions can appear more subdued.

Its Pederneira provenance adds locality interest to an already distinctive combination of colour and morphology. Preserving the crystal intact retains the complete relationship between the inner pink zone, pale surrounding material, blue green body and Midnight Blue termination.

LAPIDARY POTENTIAL:
The varied palette offers an interesting subject for specialist lapidary assessment, particularly where a design could preserve the relationship between the pink core and the surrounding cooler tones. Any proposed cut would need to account for the position of the colour zones, internal planes and available transparent material, since orientation would strongly influence which colours remain visible together.

The specimen also presents a compelling case for preservation in crystal form. Conventional cutting could separate or remove features that currently work together, especially the Midnight Blue cap and the lower pink core. A bespoke setting designed around the existing prism could showcase the full colour progression while keeping the terminal face and longitudinal surface detail visible.

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All photographs are taken under controlled lighting conditions using a macro lens, carefully selected to present each specimen as accurately as possible.
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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.
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