Pyrite Crystal Cube Mineral Specimen Natural Iron Sulfide Golden Cubic 10-20mm

Genuine Pyrite Crystal Cube Specimen (10–20mm)

This listing features a genuine Pyrite Crystal Cube mineral specimen, offered in a neat collector size range of approximately 10–20mm. These naturally formed cubes are carefully chosen for their sharp geometric shape, bright metallic lustre, and classic “golden” pyrite appearance.

The photograph provided shows an example of the type of specimen you will receive. Each cube is unique, with natural variations in edge definition, surface striations, and overall form. Please see the photos for full sizing and scale details.

Your purchase includes a Certificate of Authenticity lifetime guarantee generic card, confirming that this is a genuine natural mineral specimen.

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Mineral Species Details – What is Pyrite?

Pyrite is one of the world’s most iconic sulfide minerals, prized for its metallic shine and naturally occurring cubic crystals.

Scientific classification:

• Mineral Name: Pyrite

• Chemical Formula: FeS₂ (Iron Sulfide)

• Mineral Group: Sulfides

• Crystal System: Isometric (Cubic)

• Hardness: 6–6.5 on the Mohs scale

• Lustre: Bright metallic

• Transparency: Opaque

• Typical Colour: Brass-yellow to pale gold

Pyrite is often nicknamed “Fool’s Gold” due to its resemblance to gold, though it is a completely different mineral with its own distinct structure and chemistry.

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Natural Cubic Crystal Formation

Pyrite is famous for forming some of the most perfect cubes found in nature. These cubes develop because pyrite crystallises in the isometric system, meaning its atomic structure naturally favours symmetrical shapes.

Common natural features of pyrite cubes include:

• Sharp right-angle edges

• Flat reflective faces

• Fine natural striations (growth lines) on crystal surfaces

• Occasional stepped or intergrown cube formations

These features are entirely natural and are part of what makes pyrite cubes so desirable for mineral collectors.

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Geological Formation & Occurrence

Pyrite forms in a wide range of geological environments, including:

• Hydrothermal veins

• Metamorphic rock zones

• Sedimentary deposits rich in iron and sulfur

• Coal beds and shale formations

It crystallises when iron and sulfur combine under specific temperature and pressure conditions, often in mineral-rich fluids moving through rock fractures.

Pyrite is frequently associated with minerals such as:

• Quartz

• Calcite

• Galena

• Chalcopyrite

• Fluorite

The cubic specimens offered here represent one of the most classic and collectible forms of pyrite.

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Size Range & Collector Appeal (10–20mm)

With a size range of approximately 10–20mm, these pyrite cubes are ideal for:

• Mineral specimen collections

• Crystal display boxes and cabinets

• Educational geology kits

• Gifts for collectors and science enthusiasts

• Lapidary or reference samples

Their compact size makes them easy to store, while the natural metallic cube shape provides standout visual interest.

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Traditional Associations (Non-Medical)

Pyrite has long been admired historically for its reflective golden appearance. In spiritual traditions, it has been traditionally associated with themes of abundance and protection, though this listing focuses purely on its geological and collectible qualities, with no medical or outcome-based claims.

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Authenticity & Product Details

• Genuine Pyrite crystal cube mineral specimen

• Size Range: Approximately 10–20mm

• Natural cubic iron sulfide crystal (FeS₂)

• Bright metallic lustre with natural growth striations

• Carefully selected collector piece

• Photo shows an example of the specimen you will receive

• Includes Certificate of Authenticity lifetime guarantee generic card

A classic natural pyrite cube specimen, perfect for collectors who appreciate sharp crystal geometry, metallic minerals, and timeless geological formations.