Quick Answer
Hematite is iron oxide — Fe₂O₃ — one of the most abundant iron minerals on Earth and a major iron ore. As a bracelet stone, it's notable for three things: its metallic silver-grey surface that looks almost like polished steel, its density (significantly heavier than any silicate bracelet stone of the same size), and the fact that it leaves a red-brown streak when scratched across unglazed porcelain — the same red that gives the mineral its name from the Greek for blood.
Not a Crystal. An Ore.
Most stones used in jewelry are silicates — minerals built around silicon-oxygen tetrahedra. Quartz, feldspar, tourmaline, beryl — these are all silicate minerals, sharing a fundamental chemical architecture. Hematite is different. It's an oxide mineral: iron bonded to oxygen, with no silicon involved. Fe₂O₃. The same chemistry as rust, in a crystalline form that looks nothing like it.
This chemical difference produces material properties that set hematite apart from every silicate bracelet stone. The most immediately noticeable: weight. Hematite has a specific gravity of 5.3 — compare this to quartz at 2.65, obsidian at 2.4, or tourmaline at 3.1. An 8mm hematite bead weighs roughly twice as much as an 8mm quartz bead. On the wrist, hematite has a presence that heavier silicate stones approach but don't fully match.
The surface is equally distinctive. Polished hematite has a metallic silver-grey luster that looks more like brushed steel than any stone. This is a submetallic to metallic luster — a reflectivity class shared with metals and only a few non-metallic minerals. It's what makes hematite bracelets immediately recognizable from across a room.
The Red Inside the Grey
Hematite's name comes from the Greek haima — blood — because the powdered mineral is red, not grey. This seems contradictory until you understand that hematite's color depends on how you're looking at it. In bulk and polished form, the crystal structure reflects light in the metallic grey-silver range. Ground to a powder, the same material is deep red-brown. The mineral streak test — dragging the stone across unglazed porcelain — reveals the true powder color: red. The grey is a property of light reflection from the crystal surface; the red is the fundamental color of the iron oxide molecule.
Hematite forms in a wide range of geological environments: sedimentary deposits (where it accumulates as banded iron formations), hydrothermal veins, and as an alteration product in volcanic rocks. Major deposits are found in Brazil, Australia, South Africa, China, and the United States. The world's iron industry depends on hematite as a primary ore — the mineral that's refined to produce structural steel.
Jewelry-grade hematite is typically massive and fine-grained rather than crystalline. The specular variety — with large reflective crystal faces — is less common but produces the most striking metallic appearance. Most commercial hematite beads come from massive material polished to a high mirror finish.
At a Glance
| Mineral type | Iron oxide (Fe₂O₃) — not a silicate |
| Hardness | Mohs 5.5–6.5 |
| Density | 5.3 g/cm³ — roughly twice the weight of quartz |
| Luster | Metallic to submetallic — steel-like when polished |
| Streak color | Red-brown (diagnostic identification feature) |
| Primary sources | Brazil, Australia, South Africa, China |
| Daily wear | With care — brittle, prone to chipping on hard impact |
Hematite vs the Other Dark Stones
In the palette of dark bracelet stones, hematite occupies a position that no other stone fills. Black tourmaline is opaque and matte. Obsidian is mirror-gloss. Smoky quartz is translucent brown. Hematite is metallic grey — not black at all in strong light, but a cool silver-grey that shifts toward black in low light.
| Hematite | Black Tourmaline | Obsidian | |
| Color | Metallic grey | Black | Black |
| Surface | Metallic mirror | Semi-matte | Glass mirror |
| Weight | Very heavy | Medium | Heavy |
| Visual mood | Industrial, precise | Dense, grounding | Sharp, reflective |
The practical note on hematite durability: at Mohs 5.5–6.5, it's softer than quartz and tourmaline, and despite its density, it's brittle. Hematite beads can chip or crack if struck hard against a solid surface. This doesn't make it inappropriate for daily wear — it survives desk work and typical daily activity without issue — but it's less forgiving of physical impact than tourmaline or obsidian.
What It's Actually Like to Wear
Hematite is the most physically present bracelet stone in common use. The weight is immediately apparent when you put it on — it settles onto the wrist with a solidity that no silicate stone matches. For people who want maximum tactile anchoring, hematite is the most effective material available.
Visually, it reads as industrial — more metal than stone. The polished surface has a cool, precise quality that contrasts with the organic variation of most natural stones. There's no color to speak of in normal lighting, just silver-grey with a mirror finish. In strong directional light the metallic quality becomes pronounced; in ambient light it reads as dark grey-black.
One practical consideration: hematite is weakly magnetic in its natural form, and some hematite jewelry sold commercially is actually "magnetic hematite" — a synthetic material made from powdered hematite or other materials. True natural hematite beads are not strongly magnetic. If a "hematite" bracelet sticks powerfully to a magnet, it's likely synthetic.
Hematite in the SITU Collection
Hematite appears in SITU's 基岩 Bedrock Series as the most physically grounding stone in the palette. Where black tourmaline grounds through stillness and obsidian grounds through reflection, hematite grounds through sheer weight — through a physical reality that the body registers before the eye does.
In SITU's material language, hematite is the stone for moments when you need something unambiguous. Not soft, not complex, not optical. Just present, heavy, and precise. A reminder that the world is physical and you are in it.
Common Questions
Is hematite magnetic?
Natural hematite is weakly magnetic at most — it won't stick to a refrigerator magnet in bead form. "Magnetic hematite" sold in many jewelry markets is a synthetic product made from powdered materials pressed into shape; it's strongly magnetic and not natural hematite. If you want natural hematite, test with a magnet: natural beads show no significant attraction. Strong magnetic attraction indicates synthetic material.
Why is hematite grey if it's an iron mineral?
Hematite's surface color — metallic grey — comes from the way its crystal structure reflects light, not from the color of the iron oxide itself. The powder color of hematite is red-brown, which you can see if you drag a piece across unglazed porcelain (the streak test). The difference between the surface color and the streak color is one of hematite's diagnostic characteristics. Many iron oxides look red as powders; hematite's crystalline structure produces metallic reflection from the bulk material.
Can hematite get wet?
Brief water contact is fine. Prolonged water exposure is not recommended — hematite is iron oxide, and extended contact with water, particularly saltwater or acidic water, can cause surface oxidation and rust. Avoid swimming with hematite and dry thoroughly after any water contact. The standard guideline of removing stone bracelets before showering applies especially to hematite.
Is hematite the same as pyrite?
No. Pyrite is iron sulfide (FeS₂) — "fool's gold" — with a warmer, yellow-gold metallic color. Hematite is iron oxide with a cool grey-silver metallic color. Both are metallic-lustered iron minerals, but they're completely different compounds with different colors, different crystal structures, and different properties. They're sometimes confused because both look metallic and both contain iron.
SITU — In the midst of the flow, build an inner island.
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