Honey Yellow & Smoky Grey Fluorite | Wheal Mary Ann, Cornwall

A beautiful natural fluorite specimen from Wheal Mary Ann, Menheniot, Cornwall, featuring warm honey-yellow crystalline sections, smoky grey-green colour zoning and delicate rainbow reflections visible within its natural crystal surfaces.

Weighing 90g, this compact specimen displays a distinctive angular formation with translucent golden-yellow fluorite concentrated towards its upper section and darker smoky grey tones extending through the central and lower areas. Its intricate internal fractures, stepped crystalline surfaces and contrasting colouration create an attractive example of historic Cornish fluorite.

Specimen Description

This distinctive fluorite specimen features a compact, naturally angular formation with a gently pointed upper profile and a broader, irregular lower section.

Its colouration ranges from pale champagne and translucent honey yellow to warm golden amber, muted olive-grey and deeper smoky grey.

The upper portion displays particularly attractive honey-yellow fluorite, with translucent crystalline areas that allow light to penetrate the mineral and reveal its intricate internal structure.

These golden sections feature overlapping angular surfaces, subtle internal colour variations and naturally formed cleavage planes.

Across the central portion, the yellow fluorite transitions into cooler smoky grey-green tones, creating a distinctive contrast between the warmer upper crystals and darker underlying material.

Some areas appear almost olive-grey, while others display a deeper charcoal-grey appearance beneath the translucent crystalline surfaces.

The specimen's natural formation includes several prominent geometric faces, with stepped edges and intersecting cleavage planes visible from multiple angles.

These surfaces reflect light differently depending on the viewing position, creating a combination of glassy reflections and softer, frosted textures.

One particularly attractive feature is the subtle rainbow iridescence visible in the close-up photographs.

Small flashes of pink, green, blue and violet appear across portions of the honey-yellow crystalline material, producing delicate rainbow-like reflections.

These optical effects may result from light interacting with fine internal fractures or surface features, although their precise cause has not been independently determined.

The close-up photographs also reveal complex internal structures, including overlapping translucent crystal faces, fine fractures and angular formations.

Several surfaces display a glossy, glass-like lustre, while adjacent areas have a more textured or naturally weathered appearance.

Fine orange-brown mineral staining is visible along selected crystal boundaries and surface fractures, adding warm earthy accents to the specimen.

This staining is consistent in appearance with naturally occurring iron oxide coatings, although its composition has not been independently tested.

Viewed from the reverse, the specimen reveals a particularly attractive triangular arrangement of golden-yellow fluorite above darker smoky grey crystalline sections.

The side profiles expose additional angular cleavage surfaces and subtle changes in translucency, emphasising the specimen's natural geological formation.

Its overall appearance combines warm golden tones with cooler grey-green colouration, creating a striking contrast within a relatively compact specimen.

Measuring 46.8mm × 43.0mm and weighing 90g, this piece is an appealing addition to a collection of Cornish minerals, natural fluorite specimens or historic British mineral localities.

About Fluorite

Fluorite (CaF₂) is a naturally occurring calcium fluoride mineral belonging to the halide mineral group.

It crystallises in the cubic, or isometric, crystal system and has a Mohs hardness of 4.

Fluorite is renowned for its remarkable variety of natural colours, including purple, blue, green, yellow, brown, pink and colourless forms.

Some specimens contain multiple colours within the same crystal or crystalline mass, producing distinct zones, bands and irregular colour transitions.

These variations may develop through structural defects, trace impurities and other geological processes affecting the mineral during formation.

Yellow fluorite can range from delicate champagne and lemon-yellow shades to rich golden amber and honey-coloured tones.

Grey, green and purple colouration may also occur within fluorite, creating complex combinations of contrasting colours.

Fluorite commonly forms within hydrothermal mineral veins, where heated mineral-rich fluids circulate through fractures and cavities in surrounding rocks.

As these fluids cool or experience changes in chemical conditions, dissolved minerals can crystallise within the available spaces.

Fluorite frequently occurs alongside quartz, calcite, baryte, galena, siderite and other minerals associated with hydrothermal ore deposits.

One of fluorite's defining physical properties is its perfect octahedral cleavage.

This characteristic allows the mineral to separate along specific crystallographic planes, producing distinctive geometric surfaces and angular fractures.

Although fluorite commonly forms cubic crystals, its cleavage properties can create triangular, stepped and irregular formations when crystals are naturally fractured.

Fluorite typically displays a vitreous, or glass-like, lustre, although natural weathering and mineral coatings can produce frosted or matte surfaces.

Some fluorite specimens exhibit fluorescence under ultraviolet light, although the strength and colour vary considerably between specimens and localities.

Ultraviolet fluorescence has not been confirmed for this individual specimen.

Wheal Mary Ann & Cornish Mining Heritage

Wheal Mary Ann is a historic mineral locality situated near Menheniot in south-east Cornwall, England.

The Menheniot district forms part of Cornwall's extensive mining landscape and is particularly associated with historic lead and silver mining.

Although Cornwall is internationally renowned for its tin and copper deposits, the south-eastern part of the county also contains important lead-bearing mineral veins.

During the nineteenth century, mining operations in the Menheniot area extracted lead ores, particularly galena, which could also contain economically valuable silver.

The mineral veins developed through hydrothermal geological processes, with heated mineral-rich fluids circulating through fractures in the surrounding rocks.

These fluids deposited a varied assemblage of minerals, including quartz, fluorite, galena, siderite, calcite and other associated species.

Wheal Mary Ann is particularly interesting because historical geological studies document complex relationships between successive generations of mineral deposition.

The British Geological Survey's geological memoir covering Plymouth and South-East Cornwall identifies fluorite as an important gangue mineral at Wheal Mary Ann.

Gangue minerals occur alongside economically valuable ores but are not necessarily the principal materials being extracted.

The geological memoir describes quartz as a significant vein-filling mineral, with chalcedonic material occurring along portions of the vein walls.

Crystalline quartz, galena and siderite are also documented within the mineral sequence.

Historical geological observations indicate that at least two generations of fluorite mineralisation occurred at Wheal Mary Ann.

This suggests that the mineral veins experienced multiple episodes of deposition under changing geological conditions.

Such processes can produce complex mineral associations, overlapping crystalline formations and variations in crystal development.

Fluorite from historic Cornish localities is particularly appealing to collectors interested in British mineralogy, geological history and the country's mining heritage.

This specimen offers an attractive example of fluorite attributed to Wheal Mary Ann, with its warm honey-yellow colouration, smoky grey-green crystalline sections and distinctive natural structure.

Intention & Associated Chakras

Within traditional crystal healing practices, fluorite is associated with mental clarity, concentration, emotional balance and calm.

Yellow fluorite is commonly connected with the Solar Plexus Chakra, symbolically representing confidence, mental focus, personal understanding and clarity of thought.

The smoky grey-green sections may also be symbolically associated with grounding, reflection and emotional balance within contemporary crystal traditions.

Fluorite as a mineral is particularly associated with mental organisation, concentration and maintaining a clear perspective.

• Mental Clarity: Traditionally associated with clear thinking, understanding and mental organisation.
• Focus: Symbolically connected with concentration, learning and maintaining attention.
• Calm: Traditionally associated with peaceful reflection and a balanced mindset.
• Confidence: Yellow fluorite is commonly connected with self-assurance and personal understanding.
• Emotional Balance: Symbolically associated with maintaining perspective and emotional harmony.
• Personal Growth: Traditionally linked with learning, self-awareness and developing understanding.

Primary Chakra: Solar Plexus Chakra.

Secondary Association: Third Eye Chakra.

Primary Intention: Mental clarity, focus and calm.

These associations reflect traditional spiritual beliefs and are not scientifically established effects of fluorite.

Natural Formation & Symbolism

This specimen retains its natural crystalline structure, angular edges, exposed cleavage planes and subtle areas of mineral staining.

Its pointed upper profile gives it a distinctive appearance, with translucent golden-yellow fluorite extending above darker smoky grey-green crystalline material.

The warm honey-yellow sections create a luminous appearance, while the cooler grey-green areas provide contrasting depth.

Several crystal faces reflect light with a glassy lustre, revealing the intricate internal structure of the mineral.

Other areas display a slightly frosted or naturally weathered texture, adding to its geological character.

The delicate rainbow reflections visible within selected crystalline surfaces provide an additional point of visual interest.

These small flashes of colour become particularly noticeable under close inspection and directional lighting.

Within traditional crystal symbolism, yellow fluorite is associated with mental clarity, confidence and concentration.

Beyond its symbolic associations, this specimen's appeal lies in its contrasting natural colouration, intricate crystalline structure and connection to Cornwall's historic mineral-producing landscape.

Specimen Details

• Mineral: Fluorite
• Chemical Formula: CaF₂
• Mineral Group: Halides
• Crystal System: Cubic (Isometric)
• Mohs Hardness: 4
• Supplied Locality Attribution: Wheal Mary Ann
• Location: Menheniot, Cornwall, England
• Weight: 90g
• Dimensions: 46.8mm × 43.0mm
• Formation: Natural fluorite specimen
• Colour: Honey yellow, golden amber, champagne, smoky grey and muted grey-green
• Features: Natural colour zoning, translucent crystalline sections, stepped cleavage surfaces, angular crystal faces, internal fractures, subtle rainbow reflections and minor orange-brown mineral staining
• Shape: Raw
• Finish: Natural, unpolished
• Quantity: One individual specimen

You will receive the exact specimen photographed. Natural mineral specimens may display irregular edges, fractures, inclusions, uneven surfaces, mineral staining and delicate crystalline formations.

The acrylic display support, wooden plinth and decorative flowers shown in the photographs are not included.

Sources & References

1. British Geological Survey – Plymouth and South-East Cornwall Area, Geological Memoir (Sheet 348). Geological documentation describing the Menheniot mineral veins, Wheal Mary Ann mineralisation and multiple generations of fluorite formation.
   British Geological Survey Geological Memoir
2. British Geological Survey – Silver, Mineral Resources Consultative Committee Mineral Dossier. Geological and historical information concerning the Menheniot lead-silver mining district.
   British Geological Survey Silver Mineral Dossier
3. Mindat – Wheal Mary Ann, Menheniot, Cornwall. Mineral locality database documenting fluorite and associated mineral species.
   Wheal Mary Ann Mineral Locality
4. University of Cambridge – Fluorite Mineral Collection. Mineralogical information concerning fluorite's chemical composition, crystal system, cleavage and physical properties.
   University of Cambridge Fluorite Collection
5. Henwood, W. J. (1871). Observations on Metalliferous Deposits: On the Lead Mines of Menheniot, Lanreath and Saint Pinnock. Transactions of the Royal Geological Society of Cornwall, Volume 8, pages 699–722.