Roscoelite Mineral Specimen Tanzania Green Vanadium Mica Crystal 24-50mm

Genuine Roscoelite Mineral Specimen from Tanzania (24–50mm)

Add a rare and visually distinctive mineral to your collection with this authentic Roscoelite specimen from Tanzania. Known for its rich green tones and mica-like texture, Roscoelite is a sought-after collector mineral, appreciated for both its rarity and its fascinating geological origins.

This listing is for a carefully chosen natural piece in the size range of approximately 24–50mm. Each specimen is selected for attractive colour, mineral character, and display quality. The photographs show an example of the type of specimen you will receive, and full sizing can be confirmed by referencing the images provided.

Every specimen is a genuine natural mineral and includes a Certificate of Authenticity lifetime guarantee generic card, making it an excellent choice for collectors, educational displays, or unique gifting.

Mineral Species & Scientific Details

Roscoelite is a vanadium-rich member of the mica group, valued for its unusual chemistry and green coloration.

Key mineral information:

• Mineral Name: Roscoelite

• Mineral Group: Mica (Phyllosilicates)

• Chemical Composition: Potassium vanadium aluminium silicate

• Crystal System: Monoclinic

• Typical Appearance: Platy or scaly mica aggregates

• Lustre: Pearly to vitreous

• Transparency: Translucent to opaque

• Hardness: Approximately 2.5–3 on the Mohs scale

Its green colour is caused by vanadium content, which makes Roscoelite especially distinctive among mica minerals.

Geological Formation & Tanzanian Locality

Roscoelite forms in specific geological environments where vanadium is present, often associated with hydrothermal mineral activity. It can develop within metamorphic and altered rock zones, sometimes appearing alongside quartz veins and other silicate minerals.

Tanzania is known for producing a variety of rare and collectible minerals due to its complex geological history, including ancient metamorphic belts and mineral-rich hydrothermal systems. Specimens from this region are prized for their strong natural colour and interesting mineral associations.

Over millions of years, mineral-rich fluids and changing pressure conditions allow Roscoelite to crystallise in its characteristic layered mica structure.

Colour, Texture & Natural Features

Roscoelite is admired for its earthy green shades, which may range from deep forest green to lighter olive tones depending on mineral concentration and natural growth.

These specimens may display:

• Layered mica-like surfaces

• Natural crystalline shimmer in light

• Subtle inclusions from surrounding host rock

• Unique textures formed during mineral growth

Because Roscoelite forms in natural aggregates rather than large single crystals, each piece has its own distinctive character. No two specimens are identical.

Size Range & Display Uses (24–50mm)

With a size range of 24–50mm, these Roscoelite specimens are ideal for:

• Mineral and crystal collections

• Display cabinets and shelves

• Educational geology study samples

• Unique natural gifts for collectors

• Photography and creative display projects

This size offers excellent visual impact while remaining easy to store or showcase.

Authenticity & What You Receive

• Genuine natural Roscoelite mineral specimen

• Sourced from Tanzania

• Size range: Approximately 24–50mm

• Carefully selected example piece

• Includes Certificate of Authenticity lifetime guarantee generic card

Roscoelite is a fascinating and uncommon mineral that brings both geological interest and striking natural colour to any collection.