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Discover one of the most distinctive Chifeng fluorite specimens to emerge from Inner Mongolia’s 2023–2024 find. This exceptional piece displays cuboctahedral fluorite crystals rising from radiating clusters of yellow muscovite, creating a visually striking and locality-defining combination.
A key part of what elevates this material is the crystal geometry itself. A cuboctahedron combines both cubic and octahedral faces—six squares and eight triangles arranged in perfect symmetry. While this form is theoretically possible in fluorite, it requires highly stable and unusually balanced growth conditions that are rarely sustained long enough for full expression. Crystallographic sources such as Mindat note that cuboctahedral fluorite is documented but far less common in nature compared to standard cubic or octahedral habits. This scarcity is precisely why examples from this pocket have generated so much interest among collectors who prioritize structural rarity.
Within these crystals, deep-violet corner phantoms echo the external geometry with remarkable precision, capturing earlier growth stages in sharp, angular outlines. These phantoms add depth, dimension, and a sense of layered time not typically seen in fluorite from this region—especially when paired with such an uncommon habit.
The backdrop of radiating yellow muscovite adds architectural contrast and highlights the crisp fluorite edges, giving the piece a balanced and sculptural presence. With the producing zone now exhausted, this material stands as one of the most visually and structurally compelling fluorite finds to emerge from Inner Mongolia in recent years.
Collector Significance
Specimens from this short-lived Chifeng discovery occupy a distinct position in the modern Chinese fluorite landscape. The combination of true cuboctahedral geometry, sharply formed violet phantoms, and a naturally contrasting yellow muscovite matrix represents an alignment of conditions that is both geologically uncommon and unlikely to recur. Because cuboctahedral fluorite forms only when growth parameters remain exceptionally stable over extended periods, these pieces preserve a crystallographic moment that is seldom captured in fluorite. With production now concluded, this material has already transitioned from “new find” to finite, locality-defining fluorite, making high-quality examples increasingly sought after by collectors who value structural rarity, aesthetic coherence, and long-term historical relevance within Chinese mineral collecting.
Please see Additional Info below for video. Specimen will be securely packed, shipped USPS Priority Mail and insured.
Measures approximately 160mm x 113mm x 39mm
Weighs 1.2kg
FREE shipping/insurance to U.S. residents - WE DO NOT OFFER INTERNATIONAL SHIPPING
Some specimens are beautiful.
A rare few define a category.
The Icon is a 1.26 kg hydrothermally etched Smoky Citrine from a BRAND-NEW & UNDISCLOSED locale for BG3 crystals in Brazil that commands attention the moment it is seen. Monumental in scale and presence, this crystal represents the pinnacle of what serious BG3 collectors seek: structure, integrity, and unmistakable geological character.
A Termination Sculpted by Hydrothermal Forces
From every angle, the termination reveals remarkable hydrothermal etching—an icy, sculptural landscape formed during active crystal growth. This is not surface abrasion. It is developmental history.
A complex lattice of naturally formed triangular geometries emerges across the termination, preserved in striking clarity. These repeating forms are intrinsic expressions of quartz’s crystallographic system, revealed through mineral-rich fluids moving through the structure under pressure over time.
Rather than appearing decorative or uniform, the etchings feel architectural—precise, layered, and deliberate. Light moves dynamically across the planes, creating depth and a glacial shimmer that shifts with every change in angle.
This is formation in motion—frozen at exactly the right moment.
Monumental Presence, Refined Presentation
Weighing 1.26 kilograms, The Icon carries visual and physical gravitas. The body displays luster with a smoky-citrine glow that balances warmth and shadow.
Beautifully poised on a custom stand (not pictured), the specimen presents as both a geological statement piece and a museum-level display crystal.
It does not ask for attention.
It holds it.
A New BG3 Region — Specimen-Specific Tested
The Icon originates from a newly recognized BG3-producing region in Brazil, expanding what is known among dedicated collectors. While the precise locale remains undisclosed, this discovery affirms that meaningful BG3 material continues to emerge.
This specimen has been individually tested.
There is no such thing as lab-tested or location-tested BG3. Each crystal stands on its own merits and must be evaluated accordingly. This piece has met that standard.
As always, Rocksity remains committed to education, transparency, and responsible stewardship within the BioGeometry community.
For the Collector Who Understands
The Icon sits at the highest tier for:
Advanced BG3 collectors
Those seeking hydrothermally etched terminations
Connoisseurs of Brazilian Citrine
Collectors who prioritize structure over trend
It is unmatched in character and sculptural presence.
Whether its future guardian appears soon or later, its path will unfold as intended.
Specimen Details
Weight: 1.26 kg
Origin: Brazil (new BG3-producing region)
Formation: Hydrothermal etching at termination
Testing: Specimen-specific BG3 tested
Display: Custom stand included (not pictured)
Please see Additional Info below for video. Specimen will be securely packed, shipped USPS Priority Mail and insured.
Measures approximately 19.5 cm x 8 cm x 6 cm
Weight: 1.26 kg
FREE shipping/insurance to residents of U.S. — WE DO NOT OFFER INTERNATIONAL SHIPPING
This exceptional Casteel Mine chalcopyrite specimen features richly iridescent chalcopyrite crystallization layered across a sparkling drusy quartz matrix. Naturally tarnished chalcopyrite displays vivid copper-gold, magenta, violet, and bronze tones—hallmarks of this classic Missouri locality.
A fine, sugar-like drusy quartz coating enhances the metallic luster beneath, creating depth, contrast, and shimmer from every viewing angle. The sculptural, mound-like growth gives this piece strong visual presence, making it an excellent choice for collectors who value both aesthetics and mineralogical integrity.
This specimen attracted interest from multiple international collectors during selection; however, due to shipping limitations, it is offered exclusively within the United States. High-quality chalcopyrite specimens from the Casteel Mine are increasingly difficult to source, particularly with intact druse and strong natural coloration.
A striking and uncommon example of Missouri chalcopyrite—selected for its quality, structure, and collector significance.
Please see Additional Info below for video. Specimen will be securely packed, shipped USPS Priority Mail and insured.
Measures approximately 11.5cm x 8.5cm x 8.9cm
Weight: 1.027 kg
FREE shipping/insurance to residents of U.S. — WE DO NOT OFFER INTERNATIONAL SHIPPING
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Rocksity stands at the intersection of geological expertise and thoughtful curation. We specialize in high-grade, mindfully sourced minerals, crystals and gemstones — carefully selected to meet both the expectations of serious collectors and those attuned to the energetic qualities of crystals. Every specimen is presented with transparency and intention, supporting a broad community of mineral enthusiasts, practitioners, and seekers alike.
