Hematite Tumbles

Tumbled hematite with the specular metallic luster that distinguishes this iron oxide from any other lapidary mineral. Silvery-gray to black color on a polished surface; between 20 and 30 mm in diameter and 15 to 25 grams.

Material fact sheet

How hematite is formed

Hematite is the most abundant iron oxide in the Earth's crust and forms in three main contexts. In banded iron formation (BIF) sedimentary deposits, it precipitated 2,400-1,800 million years ago when free oxygen began to accumulate in the oceanic atmosphere and oxidized dissolved iron. In hydrothermal contexts, hot fluid circulating through fractures deposits hematite in veins alongside quartz and calcite. In metamorphic environments, heat and pressure reorganize previous iron oxides and produce the high-luster specular variety—called specular hematite—whose laminar crystals are responsible for the metallic reflection of polished tumbled stones.

What this format is good for

• Wire wrap — the 5-6 Mohs hardness allows working with fine and medium gauges (0.6-1.0 mm); the metallic luster combines particularly well with silver (cool-silver contrast), copper (industrial feel), and oxidized brass
• Macrame — the notable weight (15-25 g) lends itself to long necklaces and thick thread pieces; avoid earrings unless the design is specifically intended for that weight
• Pocket stone — the high density and cool texture of the metallic polish make hematite one of the most recognizable tumbled stones by touch; historically it is associated with grounding and stability
• Iron oxide collecting — contrasts with limonite (yellow), goethite (brown), and magnetite (also metallic but magnetic) in thematic collections of iron minerals

Hematite in cultural tradition

The use of hematite as a red pigment—in powder, the mineral leaves a reddish-brown streak—has been documented since the Paleolithic: red ochre made from ground hematite appears in burials from 100,000 years ago in South Africa and in cave paintings across Europe. The Greek name αἱματίτης (haima = blood) refers to the color of the streak and powder. The Romans called it lapis haematites and believed it protected soldiers in battle; polished hematite has been found in Celtic and Iberian necropolises as an amulet. In modern crystal therapy readings, it is associated with grounding, protection, and concentration, extending the historical image of a mineral linked to physical strength.

The symbolic properties attributed to minerals belong to cultural and historical traditions. They are shared for educational purposes, not as medical advice or a substitute for professional care.

How to recognize genuine hematite

The most reliable test is the streak: rub the hematite on unglazed ceramic or the back of a tile. Authentic hematite leaves an unmistakable reddish-brown streak even if the mineral's surface is metallic-gray. Reconstituted hematine (hematite powder compacted with resin) leaves a similar streak but weighs less and may show bubbles under magnification.

Frequently Asked Questions

Is hematite magnetic?

Pure natural hematite is not magnetic under normal conditions. Tumbled stones sold as "magnetic hematite" are usually reconstituted hematine.

Why is the streak red if the mineral looks gray?

The surface color reflects how crystals scatter light.

Can hematite get wet?

Yes, it tolerates contact with water. Dry thoroughly after cleaning. Hematite is an already oxidized iron oxide.