Pale Blue-Green Fluorite with White Crystalline Growth | Wheal Mary Ann, Cornwall

A beautiful natural pale blue-green fluorite specimen from Wheal Mary Ann, Menheniot, Cornwall, featuring translucent sea-glass coloured crystals surrounded by delicate white crystalline growth, soft champagne tones and warm golden-brown mineral staining.

Weighing 155g, this attractive Cornish mineral specimen displays a wonderfully intricate crystalline surface, with angular fluorite formations, sparkling white crystal clusters and subtle variations in transparency. Its naturally irregular shape and contrasting textures make it a particularly interesting example of historic Cornish mineralisation.

Specimen Description

This distinctive specimen displays a beautiful combination of pale blue-green, soft seafoam, icy grey-blue, creamy white and delicate champagne-coloured crystalline formations.

The specimen has a broad, irregular upper section that gradually narrows towards its lower edge, creating a naturally tapered appearance.

Across its surface, translucent blue-green fluorite crystals emerge between densely intergrown white crystalline formations.

The fluorite displays subtle variations in colour, ranging from pale watery green to slightly deeper blue-grey tones.

Several crystal faces exhibit a softly glass-like lustre, allowing light to penetrate their surfaces and reveal delicate internal structures.

One of the most attractive features is the abundance of small, sparkling white crystals distributed across the specimen.

These form intricate clusters around the larger fluorite sections, creating a beautifully textured surface with numerous reflective crystal faces.

The close-up photographs reveal an especially interesting area of crystalline growth, where angular translucent crystals overlap with smaller, irregular white formations.

Some sections appear almost colourless, while others display a delicate blue-green tint beneath the surrounding crystalline material.

Natural fractures, stepped crystal boundaries and uneven growth surfaces contribute to the specimen's complex appearance.

Scattered throughout the specimen are small areas of warm golden-orange and rusty-brown mineral staining.

These markings provide a subtle contrast against the cooler blue-green fluorite and white crystalline growth.

The staining is visually consistent with iron-bearing mineral deposits, although its precise composition has not been independently confirmed.

Viewed from different angles, the specimen reveals a variety of crystal structures, from relatively smooth translucent faces to rougher, densely intergrown crystalline sections.

The reverse displays additional pale green and grey-blue mineral areas, interspersed with creamy crystalline growth and natural surface irregularities.

Its combination of soft colouration, translucent mineral sections and sparkling crystalline textures gives this specimen considerable visual interest.

Measuring 52.3mm × 46.5mm and weighing 155g, this is an attractive natural fluorite specimen attributed to the historic Wheal Mary Ann locality in Cornwall.

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 widely admired by mineral collectors for its remarkable variety of natural colours, including green, blue, purple, yellow, pink and colourless forms.

These colours can develop through trace impurities, structural defects and geological conditions during mineral formation.

Blue-green fluorite can display a particularly delicate range of colours, from pale seafoam and watery green to soft blue-grey tones.

The appearance of these colours may vary depending on lighting, crystal thickness, transparency and the presence of associated minerals.

Fluorite commonly develops 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 pressure and 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 that fluorite can naturally separate along particular crystallographic planes, sometimes producing distinctive angular surfaces and triangular formations.

Fluorite typically exhibits a vitreous, or glass-like, lustre, although natural weathering, fine crystalline coatings and irregular surface growth can produce a softer or frosted appearance.

Its combination of colour, transparency, crystal structure and geological associations makes fluorite a popular mineral among collectors worldwide.

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 formed 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, white crystalline growth and naturally contrasting mineral textures.

Intention & Associated Chakras

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

Green fluorite is traditionally connected with the Heart Chakra, symbolically representing compassion, harmony and emotional wellbeing.

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

The delicate blue-green colouration of this specimen brings together these traditional symbolic associations.

• Emotional Balance: Traditionally associated with maintaining calm and emotional harmony.
• Mental Clarity: Symbolically connected with clear thinking and understanding.
• Communication: Blue fluorite is traditionally associated with honest expression and thoughtful communication.
• Focus: Commonly linked with concentration and mental organisation.
• Calm: Associated in crystal traditions with peaceful reflection and a balanced mindset.
• Personal Growth: Green fluorite is symbolically connected with renewal and positive development.

Primary Chakra: Heart Chakra.

Secondary Chakra: Throat Chakra.

Primary Intention: Calm, emotional balance and mental clarity.

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

Natural Formation & Symbolism

This specimen retains its natural crystalline formation, displaying a complex arrangement of translucent fluorite sections and smaller white crystalline growth.

Its broad upper section gradually narrows towards the base, creating an irregular, naturally tapered silhouette.

The pale blue-green fluorite exhibits softly glass-like crystal faces, with subtle internal cloudiness and variations in transparency.

Smaller white crystalline formations cover portions of the specimen, producing an intricate, sparkling texture.

Natural fractures, angular boundaries and uneven crystal surfaces create further visual interest.

Warm golden-brown mineral staining adds contrast to the cooler blue-green and white colour palette.

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

Beyond these symbolic associations, this specimen's principal appeal lies in its delicate natural colouration, intricate crystalline growth 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: 155g
• Dimensions: 52.3mm × 46.5mm
• Formation: Natural fluorite specimen with associated white crystalline growth
• Colour: Pale blue-green, seafoam, grey-blue, creamy white and champagne
• Features: Translucent fluorite, sparkling white crystalline clusters, angular crystal faces, natural fractures and golden-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.