Pyrite Crystal Cube S Natural Cubic Iron Sulphide Mineral Specimen

Description

Pyrite Crystal Cube – Natural Iron Sulphide Mineral from S

This Pyrite Crystal Cube from S is a genuine natural mineral specimen featuring a well-defined cubic crystal form. Carefully selected for its sharp geometry, metallic lustre, and classic Spanish locality, this piece represents one of the most recognisable crystal habits in mineral collecting. The photograph shows the exact specimen you will receive. Please refer to the listing images for full sizing and proportions.

This crystal is a genuine specimen and includes a Certificate of Authenticity lifetime guarantee generic card.

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Mineral Type & Scientific Classification

Pyrite is composed of Iron Sulphide (FeS₂) and belongs to the sulphide mineral group. It crystallises in the isometric (cubic) crystal system, commonly forming cubes, pyritohedrons, and combinations of both.

Spanish pyrite, particularly from the Navajún locality in La Rioja, is internationally renowned for producing exceptionally sharp and highly geometric cubic crystals embedded in marl matrix. These specimens are prized for their symmetry and clean crystal edges.

Pyrite has a Mohs hardness of approximately 6–6.5, a metallic lustre, and a pale brass-yellow colour often referred to as “fool’s gold” due to its resemblance to gold.

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Crystal Form, Surface Features & Appearance

This Spanish Pyrite crystal cube may display:

• Well-defined cubic crystal habit
• Bright metallic brass-yellow colour
• Natural striations across crystal faces
• Sharp edges and geometric symmetry
• Matrix attachment (if present)

Fine parallel striations are commonly visible on the crystal faces, reflecting internal growth patterns during formation. The reflective metallic surface enhances the crisp cubic geometry, making it an eye-catching display specimen.

Due to its iron content, minor natural tarnishing may occur over time, adding character to the specimen.

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Geological Formation & Spanish Locality

Pyrite forms in a variety of geological environments, including sedimentary, metamorphic, and hydrothermal settings. The famous Spanish cubic pyrites typically form within Cretaceous marl deposits, where mineral-rich fluids allowed slow crystal growth within sedimentary layers.

The controlled growth environment in these deposits enables the formation of unusually sharp and isolated cubic crystals, making Spanish pyrite highly sought after by collectors worldwide.

Over geological time, iron and sulphur combined under specific temperature and chemical conditions to crystallise into the cubic structure seen in this specimen.

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Collecting Significance & Traditional Associations

Pyrite is one of the most iconic sulphide minerals due to its metallic lustre and geometric crystal habit. Spanish cubic pyrite specimens are especially valued for their precision and display quality.

Pyrite has been traditionally associated in spiritual symbolism with abundance and confidence. These interpretations are cultural and symbolic rather than scientific.

This Pyrite Crystal Cube from S is suitable for:

• Sulphide mineral collections
• Spanish locality collectors
• Educational geology displays
• Cabinet specimen collections
• Unique natural mineral gifts

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Authenticity & Individual Selection

• Genuine Pyrite (Iron Sulphide – FeS₂)
• Mineral group: Sulphide
• Crystal system: Isometric (Cubic)
• Mohs hardness: 6–6.5
• Natural cubic crystal formation
• Locality: S
• Exact specimen shown in photographs
• Includes Certificate of Authenticity lifetime guarantee generic card

Naturally formed and preserved in its classic cubic habit, this Spanish Pyrite Crystal Cube offers a striking example of geometric mineral growth and is an excellent addition to any serious mineral collection or display.