The Story & Details
Extraordinary crystal growth. Glass-like formations. A hidden world of ultraviolet colour.
Some mineral specimens are beautiful because of their colour. Others because of their symmetry. And then there are specimens like this, where the extraordinary complexity of natural crystal growth becomes the entire attraction.
This remarkable Dogtooth Calcite and Fluorite Crystal Cluster originates from the renowned Yaogangxian Mine, Hunan Province, China, a locality celebrated among mineral collectors for its diverse and often spectacular crystal formations.
Weighing an impressive 1.027kg, this substantial specimen features an intricate arrangement of transparent to smoky crystal points emerging from a contrasting natural mineral matrix.
What makes this piece particularly fascinating is the variation in its crystal growth.
Long, sharply terminated crystals extend in different directions, crossing over shorter formations and creating an almost architectural arrangement of intersecting mineral structures.
Some crystals are remarkably transparent, allowing light to pass through their elongated faces. Others display smoky brown tones, internal inclusions and natural growth markings that reveal the complexity of their formation.
Among the Calcite crystals are areas of pale green Fluorite, introducing another mineral species into an already fascinating geological composition.
But the specimen holds one more surprise.
Under ultraviolet light, areas of the specimen illuminate with an extraordinary electric-blue fluorescence.
The contrast between its understated natural appearance and its vivid response to UV illumination makes this an especially interesting piece for collectors who appreciate unusual mineral behaviour.
Unpredictable growth. Remarkable transparency. A geological formation that refuses to be ordinary.
Dogtooth Calcite: Crystals with Extraordinary Geometry
Calcite is a calcium carbonate mineral with the chemical formula CaCO3.
It is one of the most widespread minerals in the Earth's crust, forming in a remarkable variety of geological environments, including hydrothermal veins, sedimentary deposits and mineral-rich cavities.
Calcite is particularly celebrated among mineral collectors because of the diversity of its crystal habits.
Depending on the conditions in which it forms, Calcite can develop as rhombohedral crystals, elongated prisms, scalenohedral formations and many other distinctive shapes.
Dogtooth Calcite is the commonly used name for sharply pointed, tooth-like scalenohedral Calcite crystals.
These formations develop when crystal growth favours elongated, tapering faces that meet at pronounced terminations.
The resulting crystals can resemble pointed teeth, creating the distinctive appearance from which the name originates.
This specimen displays an intricate collection of elongated, transparent and smoky-toned crystals, with numerous points extending across the exposed mineral surface.
Several crystals intersect or overlap, producing a complex three-dimensional arrangement rather than a simple, uniform cluster.
Fine internal features, variations in transparency and natural mineral deposits add further visual interest.
The result is a formation that rewards close examination, revealing different structures and reflections as the viewing angle changes.
Fluorite: Colour, Structure & Ultraviolet Fluorescence
Fluorite is a calcium fluoride mineral with the chemical formula CaF2.
It is well known for its remarkable range of colours, which can include purple, green, blue, yellow and colourless varieties.
Fluorite is also closely associated with the phenomenon of fluorescence, a term derived from the mineral's name.
Some Fluorite specimens absorb ultraviolet radiation and emit visible light, producing striking colours that are not apparent under ordinary illumination.
This behaviour depends on factors including trace elements, structural defects and the specific conditions under which the mineral formed.
In this specimen, pale green mineral areas contrast with the surrounding Calcite crystals.
Under ultraviolet illumination, sections of the specimen display an intense blue glow, creating a dramatic transformation in appearance.
The fluorescent response provides an additional dimension to the specimen, allowing its mineral features to be appreciated under different lighting conditions.
Fluorescence can vary according to the wavelength and intensity of the ultraviolet light used.
The precise source of the fluorescence has not been independently verified through mineral testing.
Yaogangxian Mine: A Celebrated Chinese Mineral Locality
The Yaogangxian Mine is located in Hunan Province, China, and is internationally recognised among mineral collectors for its exceptional diversity of mineral specimens.
The locality is associated with complex hydrothermal mineralisation, where mineral-bearing fluids circulated through geological structures and deposited different minerals over time.
Yaogangxian is particularly well known for producing collectible specimens of Fluorite, Quartz, Calcite and several other mineral species.
Its mineral formations frequently display intricate crystal associations, unusual growth habits and contrasting textures.
Specimens containing multiple mineral species are especially interesting because they can reveal aspects of the changing geological conditions during mineral formation.
Different minerals may crystallise during separate stages of mineral deposition, sometimes producing overlapping or intergrown structures.
This Dogtooth Calcite and Fluorite specimen demonstrates the visual complexity for which the locality is admired.
Its sharply terminated crystals, contrasting matrix and fluorescent mineral areas create a fascinating example of natural mineral diversity.
A Collector's Specimen with Unusual Crystal Growth
At 1.027kg, this is a substantial natural mineral specimen with considerable visual presence.
Unlike a polished tower or sphere, its appeal lies in the irregularity and complexity of its natural crystalline structure.
Numerous transparent and smoky-toned crystal points extend across the front, creating a densely layered arrangement of overlapping formations.
The different crystal sizes and orientations give the specimen an almost sculptural appearance.
Some crystals project outward at sharp angles, while others sit partially concealed beneath neighbouring formations.
The reverse reveals a contrasting pale mineral matrix, offering a glimpse of the geological foundation supporting the exposed crystals.
Areas of pale green mineral growth introduce further colour variation.
When viewed under ultraviolet light, the blue fluorescent response provides an entirely different perspective on the specimen.
Presented on its display stand, the cluster becomes an impressive centrepiece suitable for a mineral cabinet, collector's collection, geological display or carefully curated interior.
Its combination of natural crystal geometry, mineral association and UV-reactive features makes it particularly appealing to collectors who favour unusual geological formations over conventional polished pieces.
Traditional Associations
Within contemporary crystal and spiritual traditions, Calcite is commonly associated with:
- Cleansing & Purification: Symbolically associated with clearing stagnant energy and creating a sense of renewal.
- Transformation: Representing personal development, change and the release of outdated patterns.
- Motivation: Traditionally associated with renewed enthusiasm, forward movement and personal growth.
- Emotional Balance: Symbolising steadiness, perspective and a calmer approach to challenges.
- Clarity: Encouraging reflection, understanding and a clearer sense of purpose.
Fluorite carries its own traditional associations:
- Focus & Clarity: Commonly associated with concentration, organisation and clear thinking.
- Intuition: Symbolically connected with inner awareness and recognising patterns or possibilities.
- Protection: Traditionally used as a symbol of energetic boundaries and stability.
- Spiritual Growth: Associated with self-discovery, reflection and expanding personal understanding.
- Transformation: Representing the ability to adapt, reorganise and embrace change.
Combined, Calcite and Fluorite symbolise clarity through complexity, transformation through understanding and the balance between intuition and structured thought.
The unusual intergrowth of the minerals offers a visual reminder that different structures can develop together to create something extraordinary.
These associations are based on spiritual beliefs and cultural traditions rather than scientifically established therapeutic effects.
Product Details
- Primary Mineral: Dogtooth Calcite
- Associated Mineral: Fluorite
- Weight: Approximately 1.027kg (1,027g)
- Locality: Yaogangxian Mine, Hunan Province
- Country of Origin: China
- Form: Natural mineral cluster
- Colour: Transparent, smoky grey, earthy brown, pale green and white
- Crystal Features: Elongated pointed formations, intersecting crystal growth, natural inclusions and contrasting mineral matrix
- Special Feature: Blue fluorescence visible under ultraviolet illumination
- Display: Presented on a display stand
- Availability: One of a kind
- Photographs: Exact specimen shown
Display & Care
Calcite measures approximately 3 on the Mohs hardness scale, making it relatively soft compared with minerals such as Quartz.
Fluorite measures approximately 4 on the Mohs hardness scale and also possesses well-developed cleavage, meaning it can fracture along particular crystallographic planes.
Both minerals should therefore be handled carefully, particularly where delicate crystal points extend outward from the main specimen.
Always support the main body of the specimen when moving it rather than lifting it by individual crystal formations.
Display on a stable, level surface away from areas where it could be knocked or disturbed.
Avoid sudden temperature changes, prolonged direct sunlight and exposure to harsh cleaning products.
Do not soak or immerse the specimen in water. Calcite is sensitive to acidic substances, including vinegar and many household cleaning solutions.
Dust gently using a soft, dry brush, taking care around the more delicate crystal terminations.
When examining the specimen under ultraviolet light, use an appropriate UV mineral lamp and avoid looking directly into the light source or exposing unprotected eyes and skin.
Please Note
- You will receive the exact Dogtooth Calcite and Fluorite specimen shown in the photographs.
- Natural mineral specimens may contain inclusions, internal fractures, matrix deposits, irregular crystal growth and incomplete or contacted crystal terminations.
- Some exposed crystal points may be delicate and should be handled with care.
- Colours, transparency and fluorescence may appear different depending on lighting conditions, viewing angle and screen settings.
- Ultraviolet fluorescence may vary depending on the wavelength and strength of the UV light used.
- The precise mineral responsible for the observed blue fluorescence has not been independently confirmed.
- Weight is approximate.
- Metaphysical information is provided for spiritual and cultural interest only and is not intended as medical advice.
Glass-like crystals. Unexpected mineral associations. A hidden electric-blue world revealed by ultraviolet light.
Crystal Asylum | Hand-selected for those who appreciate the unusual, the powerful and the extraordinary.