Kimberlite Mineral Specimen South Africa 40-70mm Volcanic Rock Collectible

Kimberlite Mineral Specimen – South Africa (40–70mm)

This genuine Kimberlite mineral specimen from South Africa is a fascinating example of one of the most geologically significant volcanic rocks on Earth. Measuring approximately 40–70mm (please see photo for full sizing), each piece is carefully selected for quality, structure and character. The photograph shows an example of the actual specimen you will receive.

This specimen includes a Certificate of Authenticity lifetime guarantee generic card, confirming it as a genuine natural geological example.

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What is Kimberlite?

Kimberlite is an ultramafic volcanic rock best known as the primary host rock of natural diamonds. It forms deep within the Earth’s mantle at depths exceeding 150 kilometres and is transported rapidly to the surface through explosive volcanic eruptions. These eruptions create vertical geological structures known as kimberlite pipes.

Rock Type: Ultramafic igneous volcanic rock
Origin Depth: Upper mantle
Formation Style: Explosive pipe eruptions
Texture: Porphyritic, brecciated or fragmental
Colour: Typically bluish-grey, greenish-grey, brown or weathered yellow

Kimberlite often contains visible mineral fragments set within a fine-grained matrix, giving it a distinctive speckled or brecciated appearance.

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Geological Significance – South African Kimberlite

South Africa is globally renowned for its historic and economically important kimberlite deposits. The discovery of kimberlite pipes in regions such as Kimberley during the 19th century transformed the understanding of deep mantle geology.

South African kimberlites are associated with:

• Cratonic continental regions

• Ancient stable geological shields

• Mantle-derived mineral assemblages

Typical associated minerals within kimberlite may include:

• Olivine (often altered to serpentine)

• Pyrope garnet

• Chrome diopside

• Ilmenite

• Phlogopite mica

These mantle indicator minerals are highly valued by geologists and collectors alike.

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Appearance & Natural Characteristics

Each specimen displays natural volcanic textures typical of kimberlite. Features may include:

• Fragmental or brecciated structure

• Rounded or angular mantle-derived mineral inclusions

• Fine-grained matrix with contrasting mineral grains

• Weathering patterns showing yellow-brown surface oxidation

Due to its mantle origin and rapid emplacement, kimberlite often preserves mineral fragments that provide insight into Earth’s deep interior processes.

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Size, Selection & Authenticity

• Mineral/Rock: Kimberlite

• Locality: South Africa

• Size Range: 40–70mm

• Condition: Natural, unenhanced

• Certification: Includes Certificate of Authenticity lifetime guarantee generic card

• Selection: Carefully chosen example specimen

Each piece is a natural geological formation with no artificial treatment or enhancement.

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Ideal for Collectors & Geological Study

Kimberlite specimens are highly sought after by:

• Mineral and rock collectors

• Geology students and educators

• Those interested in mantle geology

• Collectors of diamond-associated minerals

• Educational display collections

As the primary host rock of diamonds, kimberlite holds exceptional geological importance. While not all kimberlite contains diamonds, every specimen represents material that originated from deep within the Earth’s mantle.

In some spiritual traditions, stones from deep Earth origins are traditionally associated with grounding symbolism; however, this specimen is offered strictly as a natural geological collectible.

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A distinctive and educational Kimberlite mineral specimen from South Africa, showcasing mantle-derived volcanic rock with significant geological heritage and collector appeal.