Pale Blue Fluorite Cluster | Wheal Mary Ann, Cornwall

A beautiful natural pale blue fluorite specimen from Wheal Mary Ann, Menheniot, Cornwall, featuring delicate icy-blue crystalline formations, soft white mineralised areas and subtle golden-brown staining.

Weighing 110g, this distinctive specimen displays a naturally irregular, angular formation with densely clustered translucent crystals and contrasting areas of deeper blue-grey fluorite. Its frosted appearance, intricate crystalline texture and historic Cornish locality make it an attractive addition to a British mineral collection.

Specimen Description

This attractive Cornish fluorite specimen features a densely crystalline surface of pale blue and blue-grey fluorite, with irregularly arranged crystal faces creating a delicate, textured appearance.

The specimen has an unusual, naturally angular shape, with a broader crystalline upper section tapering towards a narrower lower point when displayed upright.

Its predominant colour is a soft, icy blue, ranging from almost colourless and milky white to slightly deeper slate-blue and smoky blue-grey areas.

The upper and central sections are particularly attractive, displaying numerous small, translucent crystal faces that overlap to form a complex crystalline surface.

Some of these crystals possess a gentle glass-like lustre, while others appear frosted or slightly opaque, creating subtle variations in texture.

The pale blue colouration is distributed unevenly throughout the specimen, with darker blue-grey patches visible beneath lighter crystalline material.

These variations create a naturally mottled appearance, particularly noticeable when the specimen is viewed from above.

The overhead photograph reveals a broad area of closely packed, angular crystals, with numerous small reflective surfaces catching the light.

Individual crystal faces display geometric edges and stepped formations, characteristic of fluorite's cubic crystal system and perfect octahedral cleavage.

Several areas contain creamy-white mineralised material, producing a soft contrast against the cooler blue fluorite.

Fine golden-yellow and rusty orange-brown staining is also visible across selected areas, particularly near the specimen's lower edges and along some natural fractures.

This staining is consistent in appearance with iron-bearing mineral coatings, although its exact composition has not been independently established.

The reverse and side profiles reveal additional translucent grey-green crystalline material, with darker internal areas visible beneath the paler outer surfaces.

These contrasting sections give the specimen a layered appearance, with areas of translucent fluorite alternating with more opaque, finely crystalline material.

Its natural surface includes irregular edges, small cavities, intersecting crystal faces and subtle variations in transparency.

Unlike polished fluorite, this specimen retains the original textures and imperfections associated with its natural geological formation.

The combination of delicate icy-blue colouration, densely clustered crystals and contrasting mineral staining makes this an appealing example of fluorite attributed to the historic Wheal Mary Ann locality.

Measuring 36.2mm × 60.3mm and weighing 110g, it is a compact specimen suitable for collectors of Cornish minerals, British mining specimens and naturally formed fluorite.

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 range of natural colours, including purple, blue, green, yellow, brown, pink and colourless varieties.

Its colouration can be influenced by structural defects, trace impurities and geological conditions present during crystal formation.

Blue fluorite is particularly attractive because its colour can vary considerably depending on lighting, crystal thickness and the presence of internal fractures or inclusions.

Some specimens display soft, almost colourless blue tones, while others develop deeper blue, violet-blue or smoky blue-grey colouration.

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 undergo changes in chemical conditions, dissolved minerals may crystallise within the available spaces.

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

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

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

Although fluorite commonly develops cubic crystals, natural breakage and cleavage can create stepped, triangular and irregular crystalline formations.

Fluorite typically displays a vitreous, or glass-like, lustre, although natural weathering, fine crystal growth and mineral coatings may create frosted or matte textures.

Some fluorite specimens exhibit fluorescence under ultraviolet light, although the colour and intensity vary 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 recognised for its tin and copper deposits, the south-eastern region also contains significant lead-bearing mineral veins.

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

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

Over time, 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 investigations 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 delicate pale blue colouration, frosted crystalline surfaces and distinctive natural formation.

Intention & Associated Chakras

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

Blue fluorite is commonly connected with the Throat Chakra, symbolically representing communication, self-expression, understanding and thoughtful expression.

It is also associated with the Third Eye Chakra, traditionally linked with insight, mental clarity, intuition and perception.

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.
• Calm: Symbolically connected with peaceful reflection, tranquillity and emotional balance.
• Communication: Blue fluorite is traditionally associated with thoughtful expression and clear communication.
• Focus: Commonly linked with concentration, learning and maintaining attention.
• Emotional Balance: Symbolically associated with maintaining perspective and emotional harmony.
• Intuition: Traditionally connected with insight, reflection and personal understanding.

Primary Chakra: Throat Chakra.

Secondary Chakra: Third Eye Chakra.

Primary Intention: Calm, mental clarity and communication.

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

Natural Formation & Symbolism

This specimen retains its natural crystalline structure, with irregular edges, densely packed crystal faces and contrasting areas of translucent and opaque mineral material.

Its gently pointed formation creates a distinctive silhouette, while the broad crystalline surface reveals numerous small angular faces.

The pale blue and white colouration gives the specimen a delicate, almost icy appearance, contrasting with the deeper blue-grey material visible beneath the surface.

Subtle golden-brown mineral staining adds warmth to the cooler crystalline colours.

The combination of glassy and frosted surfaces creates an attractive variation in texture, particularly under directional lighting.

Within traditional crystal symbolism, blue fluorite is associated with clarity, calm and communication.

Beyond these symbolic associations, this specimen's principal appeal lies in its delicate 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: 110g
• Dimensions: 36.2mm × 60.3mm
• Formation: Natural fluorite specimen
• Colour: Pale blue, icy blue, blue-grey, milky white and subtle golden-brown staining
• Features: Densely clustered crystals, natural colour variations, translucent crystalline sections, frosted surfaces, angular cleavage faces, irregular formation and minor 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.