Description
Hematite Kidney Ore – Natural Botryoidal Iron Oxide from the USA
This Hematite Kidney Ore is a genuine natural mineral specimen sourced from the USA. The photograph shows the exact piece you will receive, carefully selected for its smooth botryoidal formation, metallic lustre, and overall display quality. Full sizing details are available in the listing photos to ensure accurate scale and proportions.
Your specimen includes a Certificate of Authenticity lifetime guarantee generic card, confirming it as a genuine Hematite mineral example.
Mineral Species & Classification
Hematite is an iron oxide mineral with the chemical formula Fe₂O₃. It belongs to the oxide mineral group and crystallises in the trigonal crystal system. Hematite is one of the most important iron ores globally and is widely recognised for its metallic appearance and distinctive red streak.
Kidney Ore is a specific botryoidal variety of Hematite, named for its rounded, kidney-shaped surface formations. These smooth, bulbous structures develop through concentric mineral growth, creating a naturally polished appearance.
Hematite has a Mohs hardness of approximately 5 to 6.5 and a high specific gravity, giving it a noticeable weight relative to its size. It displays a metallic to submetallic lustre on polished surfaces and produces a characteristic reddish-brown streak when tested.
Botryoidal Structure & Surface Characteristics
Kidney Ore Hematite is defined by its botryoidal habit, meaning it forms clusters of rounded, grape-like or kidney-shaped masses. These shapes result from mineral precipitation in layers, typically within cavities or along surfaces in iron-rich environments.
The smooth exterior often appears naturally polished due to the fine-grained crystalline structure. While the surface may appear metallic silver-grey to dark steel in colour, the interior and streak remain red due to its iron oxide composition.
This specimen retains its natural botryoidal formation. Any subtle surface textures or minor irregularities are part of its geological development and confirm its authenticity.
Geological Formation & Occurrence
Hematite forms in a variety of geological settings, including sedimentary deposits, hydrothermal veins, and metamorphic environments. Kidney Ore specifically develops in iron-rich sedimentary or hydrothermal systems where iron precipitates from solution and builds up in concentric layers over time.
In the United States, significant Hematite deposits occur in regions historically associated with iron mining. These formations developed through ancient sedimentary processes and later geological activity that concentrated iron oxides into economically and mineralogically important deposits.
Associated minerals can include quartz, magnetite, goethite, limonite, and other iron oxides depending on the locality and formation conditions.
Collecting, Display & Educational Interest
Hematite Kidney Ore is highly valued among mineral collectors for its classic botryoidal form and strong metallic appearance. Its smooth, rounded surfaces make it an attractive display piece for cabinets, desks, or curated geological collections.
Due to its importance as an iron ore and its well-defined crystal system, Hematite is also of interest to students and enthusiasts studying mineralogy and economic geology.
In various cultural traditions, Hematite has been traditionally associated with grounding and strength in symbolic practices. These associations are spiritual in nature and reflect historical interpretations of iron-rich minerals.
Authenticity & Individual Selection
• Genuine Hematite Kidney Ore
• Origin: USA
• Mineral group: Oxide
• Chemical formula: Fe₂O₃
• Crystal system: Trigonal
• Botryoidal kidney ore formation
• Carefully selected individual specimen
• You will receive the exact piece shown
• Includes Certificate of Authenticity lifetime guarantee generic card
Each Hematite Kidney Ore specimen forms through natural iron oxide deposition over geological timescales, resulting in unique surface contours, metallic tones, and structural variations in every individual piece.
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