Pale Blue Fluorite with Golden Iron Oxide | Wheal Mary Ann, Menheniot, Cornwall

A striking natural pale blue fluorite specimen from Wheal Mary Ann, Menheniot, Cornwall, displaying translucent blue-grey crystalline formations, contrasting golden-orange iron oxide staining and intricate mineral textures.

Weighing 310g, this beautiful Cornish mineral specimen features a combination of softly coloured fluorite, naturally fractured crystal faces and richly coloured iron-stained areas that reveal the complexity of its geological formation.

Specimen Description

This substantial fluorite specimen presents an attractive combination of pale icy-blue, blue-grey and translucent colourless crystalline sections, interspersed with vivid rusty-orange and golden-brown mineral staining.

The principal display face reveals broad, angular fluorite surfaces with varying degrees of transparency. Some sections appear softly clouded, while others possess a glass-like appearance that allows light to penetrate the crystal structure.

Across the specimen, naturally occurring iron oxide staining creates striking areas of warm orange and ochre, contrasting beautifully with the cooler blue-grey fluorite.

These deposits follow crystal boundaries, natural fractures and irregular surface features, highlighting the complex mineral growth and alteration processes associated with the specimen.

One particularly interesting area contains a small recess surrounded by golden-orange mineral deposits and translucent crystalline growth.

The close-up photograph reveals an intricate arrangement of angular crystal faces, fine surface textures and small reflective mineral surfaces within this recess.

The opposite face displays a broader expanse of pale blue-grey fluorite, with numerous overlapping crystalline surfaces and naturally occurring inclusions.

Its irregular, elongated formation creates an attractive display profile, particularly when positioned to showcase the contrasting blue fluorite and richly coloured iron-stained areas.

Measuring 83.8mm × 55.0mm and weighing 310g, this specimen offers an appealing combination of colour, texture and historic Cornish mineral provenance.

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 particularly admired for its extraordinary range of colours, including purple, blue, green, yellow, pink, grey and colourless varieties.

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

Blue fluorite is especially attractive for its cool, delicate colouring and varying degrees of translucency.

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 temperature, pressure and chemistry, dissolved minerals may crystallise within the available spaces.

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

Its distinctive cubic crystal habit is one of its most recognisable characteristics, although fluorite also possesses perfect octahedral cleavage.

These cleavage planes can produce angular surfaces and complex internal structures when crystals naturally fracture.

The golden-orange staining visible across this specimen is consistent with iron oxide or iron oxyhydroxide mineralisation, which can develop through the alteration and oxidation of iron-bearing minerals.

Such staining is commonly encountered in historic mineral specimens and provides additional visual evidence of the geological processes affecting the host mineral.

Wheal Mary Ann & Cornish Mining Heritage

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

The surrounding 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 contain economically valuable silver.

These mineral deposits developed through hydrothermal geological processes, as heated mineral-rich fluids circulated through fractures within the surrounding rocks.

Over time, these fluids deposited a varied assemblage of minerals, including quartz, fluorite, galena, siderite and associated species.

The British Geological Survey's geological memoir covering Plymouth and South-East Cornwall documents 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.

Historical geological observations indicate that multiple episodes of fluorite mineralisation occurred at Wheal Mary Ann.

This suggests that the mineral veins experienced changing geological conditions and successive periods of mineral deposition.

Such processes can create complex crystalline associations, overlapping mineral growth and variations in crystal development.

The combination of translucent blue-grey fluorite and contrasting iron-stained surfaces makes this specimen particularly interesting from a geological perspective.

Fluorite specimens attributed to historic Cornish mining localities are especially appealing to collectors interested in British mineralogy, geological history and Cornwall's mining heritage.

Intention & Associated Chakras

Within traditional crystal healing practices, blue fluorite is associated with mental clarity, calm communication, emotional balance and intuitive understanding.

Its delicate blue colouring is traditionally connected with the Throat Chakra, symbolising communication, truth and self-expression.

Fluorite more generally is associated with concentration, clear thinking and emotional balance.

• Mental Clarity: Traditionally associated with clear thinking, concentration and understanding.
• Communication: Symbolically connected with honest expression and thoughtful conversation.
• Calm: Associated with peaceful reflection and emotional balance.
• Intuition: Traditionally linked with insight and personal awareness.
• Focus: Associated with organisation, learning and concentration.
• Personal Growth: Symbolically connected with understanding and positive change.

Associated Chakra: Throat Chakra.

Primary Intention: Mental clarity, communication and calm.

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

Natural Formation & Symbolism

This specimen retains its natural raw formation, displaying an irregular, elongated structure with numerous overlapping fluorite crystal surfaces.

The pale blue-grey crystalline areas contrast with the vivid golden-orange and rusty-brown iron staining, creating a distinctive geological appearance.

Angular crystal faces, natural cleavage surfaces and small mineral-filled recesses provide further detail across the specimen.

The combination of translucent sections and more opaque crystalline areas creates variation in how light interacts with the mineral.

Within traditional crystal symbolism, blue fluorite represents clarity, communication and emotional balance.

Beyond these symbolic associations, the specimen's principal appeal lies in its natural crystalline detail, contrasting mineral colours and connection to Cornwall's historic mineral-producing landscape.

Specimen Details

• Mineral: Fluorite with iron oxide staining
• Chemical Formula: CaF₂ (Fluorite)
• Mineral Group: Halides
• Crystal System: Cubic (Isometric)
• Mohs Hardness: 4
• Supplied Locality Attribution: Wheal Mary Ann
• Location: Menheniot, Cornwall, England
• Weight: 310g
• Dimensions: 83.8mm × 55.0mm
• Formation: Natural fluorite specimen with iron-stained crystalline surfaces
• Colour: Pale blue, blue-grey, translucent white, golden orange and rusty brown
• Features: Angular fluorite crystal faces, natural cleavage surfaces, translucent crystalline areas, iron oxide staining and mineral-filled recesses
• 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.