Kyanite Crystal Mineral Specimen Brazil Blue Bladed Natural Stone 20-50mm

Genuine Blue Kyanite Mineral Specimen – Brazil

This listing is for a genuine Blue Kyanite crystal mineral specimen from Brazil, sized approximately 20–50mm. The photograph shown represents an example of the actual specimen you will receive. Each piece is carefully selected for its natural structure, colour, and display appeal.

Your crystal includes a Certificate of Authenticity lifetime guarantee generic card, confirming it is a 100% genuine natural mineral specimen. Please refer to the photo for full sizing and scale.

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Mineral Classification & Chemical Composition

Kyanite is an aluminium silicate mineral with the chemical formula Al₂SiO₅. It belongs to a group of polymorph minerals that also includes andalusite and sillimanite, all sharing the same chemical composition but forming under different temperature and pressure conditions.

Key mineral data:

• Mineral Species: Kyanite

• Chemical Formula: Al₂SiO₅

• Crystal System: Triclinic

• Hardness: 4.5–5 parallel to length, 6.5–7 across width

• Lustre: Vitreous to pearly

• Transparency: Transparent to translucent

• Cleavage: Perfect in one direction

One of kyanite’s most distinctive characteristics is its variable hardness, which differs depending on the direction tested—an unusual property among minerals.

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Geological Formation & Brazilian Locality

Kyanite forms in metamorphic rocks, particularly in aluminium-rich schists and gneisses. It develops under high-pressure, relatively low-temperature conditions during regional metamorphism. Its presence is often an indicator mineral used by geologists to interpret metamorphic grade and tectonic history.

Brazil is a well-known source of high-quality blue kyanite, producing well-formed bladed crystals with strong colour saturation. These crystals commonly occur alongside minerals such as:

• Quartz

• Mica (muscovite or biotite)

• Garnet

• Feldspar

The Brazilian material is especially valued for its vivid blue tones and well-defined crystal habit.

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Crystal Habit & Appearance

Blue kyanite typically forms in elongated, bladed or columnar crystals with parallel striations running along the length of the crystal. These linear formations give the specimen a distinctive fibrous or layered appearance.

Typical features include:

• Deep to pale blue colour variations

• Silky to glassy surface lustre

• Natural striations along crystal faces

• Layered internal structure

• Occasional natural inclusions

The colour in blue kyanite is primarily due to trace elements within its crystal structure. Lighting conditions may enhance the depth and vibrancy of its natural blue tones.

Each specimen is completely natural and untreated, retaining its raw mineral character.

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Collecting & Display

Kyanite is highly regarded among mineral collectors for its distinctive bladed growth and striking colour. A 20–50mm specimen offers an ideal size for:

• Mineral and crystal collections

• Geological study samples

• Educational displays

• Cabinet specimen trays

• Thoughtful gifts for collectors

Its unique crystal habit makes it visually different from more common quartz-based minerals, adding variety and geological interest to any collection.

In spiritual traditions, blue kyanite is traditionally associated with clarity and communication; however, it is presented here strictly as a natural mineral specimen without any claims beyond its geological and collectible value.

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Authenticity & Product Details

• Genuine Blue Kyanite Mineral Specimen

• Origin: Brazil

• Size Range: Approximately 20–50mm

• Natural, unpolished crystal formation

• Includes Certificate of Authenticity lifetime guarantee generic card

• Carefully selected specimen

• Photo represents an example of the actual piece you will receive

A striking and authentic Brazilian kyanite crystal, ideal for collectors, mineral enthusiasts, and those who appreciate the natural beauty of Earth-formed specimens.