Pale Blue-Green Fluorite | Wheal Mary Ann, Cornwall

A beautiful natural pale blue-green fluorite specimen from Wheal Mary Ann, Menheniot, Cornwall, displaying soft sea-glass tones, translucent crystalline surfaces, creamy champagne mineralisation and distinctive angular formations.

Weighing 135g, this attractive Cornish mineral specimen features broad geometric crystal faces, overlapping crystalline sections and naturally occurring golden-orange mineral staining. Its delicate colouration and historic mining locality make it a lovely addition to a British mineral collection.

Specimen Description

This distinctive specimen displays a beautiful combination of pale blue-green, soft grey-green, translucent champagne and creamy-white fluorite, with scattered golden-orange and rusty-brown markings.

The specimen has an elongated, naturally irregular formation, with a broad central crystalline section and narrower, angular edges.

One of its most attractive features is the large, softly translucent blue-green crystal face occupying much of the specimen's central surface.

This prominent crystalline area has a delicate sea-glass appearance, with subtle internal cloudiness, fine surface markings and variations in transparency.

The pale blue-green colour becomes slightly deeper in certain areas, while the surrounding edges transition into softer cream, champagne and pale yellow tones.

Several angular crystal boundaries are visible across the specimen, creating a naturally geometric appearance.

The larger crystalline surfaces display a mixture of glass-like lustre and slightly frosted textures, allowing light to interact differently with each section.

Fine natural surface markings and irregular crystalline edges add further detail to the specimen.

Along the lower and outer sections, small patches of golden-orange and rusty-brown staining contrast beautifully with the cooler blue-green fluorite.

These markings are consistent in appearance with iron-bearing mineral staining, although their precise composition has not been independently confirmed.

One end of the specimen reveals a more complex arrangement of overlapping, angular crystalline surfaces, with pale champagne fluorite surrounding slightly clearer internal sections.

From the opposite side, the specimen displays a broad, softly frosted blue-green surface with additional natural mineral staining along its edges.

The contrast between the smoother-looking central crystal faces and the more irregular outer crystalline growth gives the specimen considerable visual interest.

Its natural fractures, intersecting crystal boundaries and subtle colour variations are characteristic features of an unpolished mineral specimen.

Measuring 40.0mm × 66.4mm and weighing 135g, this is an attractive example of pale blue-green fluorite attributed to the historic Wheal Mary Ann locality.

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

These colours may develop through structural defects, trace impurities and geological conditions during crystal formation.

Blue-green fluorite can display delicate shades ranging from pale aqua and sea-glass green to deeper blue-grey and greenish-blue tones.

Variations in colour and transparency can occur within a single specimen, creating subtle changes in appearance as light passes through different crystalline sections.

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 or chemical composition, 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 physical characteristics is its perfect octahedral cleavage.

This means the mineral can separate along particular crystallographic planes, producing distinctive angular surfaces.

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

Fluorite typically possesses a vitreous, or glass-like, lustre, although natural weathering, fine surface textures and mineral coatings can produce a softer, frosted appearance.

Some fluorite specimens exhibit fluorescence under ultraviolet light, although this property varies between individual specimens and localities.

Ultraviolet fluorescence has not been confirmed for this 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 important 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 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, combining delicate blue-green colouration, broad translucent crystal faces and naturally occurring mineral staining.

Intention & Associated Chakras

Within traditional crystal healing practices, fluorite is associated with mental clarity, concentration, emotional balance and maintaining a clear perspective.

Blue-green fluorite is commonly connected with calm communication, emotional harmony and clear thinking.

Its soft blue-green colouration is traditionally associated with the Throat Chakra and Heart Chakra, symbolically representing communication, emotional balance and peaceful expression.

Fluorite as a mineral is also frequently associated with organisation, focus and supporting a calm, balanced mindset.

• Mental Clarity: Traditionally associated with clear thinking, understanding and mental organisation.
• Focus: Symbolically linked with concentration, learning and maintaining attention.
• Peace & Calm: Blue-green fluorite is traditionally associated with tranquillity and emotional balance.
• Communication: Commonly connected with clear expression, understanding and thoughtful communication.
• Emotional Balance: Symbolically associated with maintaining perspective and emotional harmony.
• Clarity: Traditionally connected with clear judgement and a balanced approach to decision-making.

Primary Chakra: Throat Chakra.

Secondary Chakra: Heart Chakra.

Primary Intention: Focus, clarity and emotional balance.

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

Natural Formation & Symbolism

This specimen retains its natural crystalline structure, displaying broad angular surfaces, overlapping crystal formations and contrasting translucent and opaque areas.

Its elongated formation creates an attractive horizontal silhouette, while the prominent central crystal face gives the specimen a distinctive geometric appearance.

The pale blue-green colouration creates a soft, sea-glass quality, contrasting with the warmer champagne and creamy-yellow crystalline edges.

Several crystal faces display fine natural surface markings, while smaller intergrown sections create additional texture along the specimen's outer edges.

Scattered golden-orange mineral staining highlights selected crystal boundaries and fractures, adding further contrast to the specimen.

Within traditional crystal symbolism, blue-green fluorite is associated with calm communication, mental clarity and emotional balance.

Beyond these symbolic associations, this specimen's principal appeal lies in its delicate natural colouration, distinctive crystalline geometry 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: 135g
• Dimensions: 40.0mm × 66.4mm
• Formation: Natural fluorite specimen
• Colour: Pale blue-green, grey-green, champagne, creamy white and golden-orange
• Features: Broad translucent crystal faces, angular crystalline formations, natural surface markings, subtle colour variations and 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.