Description
Genuine Magnetite Mineral Specimen – Brazil
This listing is for a genuine Magnetite mineral specimen from Brazil, sized approximately 4–10mm. The photograph shown represents an example of the actual specimen you will receive. Each piece is carefully selected for its natural crystal form, metallic lustre, and overall collector quality.
Your specimen includes a Certificate of Authenticity lifetime guarantee generic card, confirming it is a 100% genuine and natural mineral. Please refer to the photographs for full sizing and scale.
Mineral Species & Chemical Composition
Magnetite is an iron oxide mineral with the chemical formula Fe₃O₄. It is one of the most important and widely recognised iron-bearing minerals on Earth and a major source of iron ore.
Key mineral data:
-
Mineral Species: Magnetite
-
Chemical Formula: Fe₃O₄
-
Mineral Group: Oxide
-
Crystal System: Isometric (Cubic)
-
Hardness: 5.5–6.5 on the Mohs scale
-
Lustre: Metallic to submetallic
-
Colour: Black to iron-grey
-
Transparency: Opaque
-
Streak: Black
Magnetite is known for its natural magnetic properties. While not all specimens are strongly magnetic, magnetite is capable of attracting iron due to its internal crystal structure.
Geological Formation & Brazilian Origin
Magnetite forms in a wide range of geological environments, including:
-
Igneous rocks such as basalt and gabbro
-
Metamorphic rocks
-
Skarn deposits
-
Banded iron formations
-
Hydrothermal veins
Brazil is internationally recognised for producing high-quality iron oxide minerals from its extensive Precambrian geological formations. These regions contain some of the world’s oldest rock sequences, where magnetite formed through magmatic crystallisation or sedimentary iron deposition followed by metamorphism.
Associated minerals in Brazilian deposits may include:
-
Hematite
-
Quartz
-
Pyrite
-
Chalcopyrite
-
Amphibole and other silicates
The diversity of Brazil’s mineral provinces makes it a significant locality for collectors of iron oxide specimens.
Crystal Habit & Visual Characteristics
Magnetite commonly forms well-defined cubic or octahedral crystals due to its isometric crystal system. Smaller specimens in the 4–10mm range may display:
-
Sharp crystal edges
-
Metallic reflective surfaces
-
Compact granular forms
-
Subtle natural surface textures
Its metallic sheen and dense weight relative to size make it immediately recognisable among oxide minerals.
Each specimen is natural and untreated, preserving its authentic geological features.
Size & Collector Appeal (4–10mm)
At approximately 4–10mm, this magnetite specimen is ideal for:
-
Micro-mount or thumbnail mineral collections
-
Educational geology sets
-
Study of crystal systems and iron oxides
-
Display in small specimen boxes
-
Gift additions to mineral collections
Despite its small size, magnetite remains scientifically significant due to its magnetic properties and importance in geological processes.
Scientific & Historical Significance
Magnetite plays an important role in geology and Earth sciences. It is used in paleomagnetic studies to help determine the historical orientation of Earth’s magnetic field, as tiny magnetite grains within rocks record magnetic alignment at the time of formation.
Naturally magnetised varieties are sometimes referred to as lodestone and were historically used in early navigation compasses.
In spiritual traditions, magnetite is traditionally associated with attraction symbolism; however, this listing presents the specimen strictly as a natural mineral for geological and collector interest.
Authenticity & Product Details
-
Genuine Magnetite mineral specimen
-
Origin: Brazil
-
Size Range: Approximately 4–10mm
-
Natural iron oxide crystal
-
Carefully selected piece
-
Includes Certificate of Authenticity lifetime guarantee generic card
-
Photo shows an example of the actual specimen you will receive
A compact yet scientifically important Brazilian magnetite specimen, offering classic iron oxide character and excellent addition to any mineral collection.
Reviews
There are no reviews yet.