Pinolith
Pinolith is metamorphic (magnesite-graphite rock), (magnesite + graphite/dolomite). In the hand, it rates 3.5 to 4.5 (aggregate) on the Mohs scale, and it runs white 'pine nut' ovals in graphite gray-black. Black-and-white signature stone: rice- to pine-nut-shaped white magnesite grains scattered through dark graphite matrix like grains in pumpernickel. Essentially one source: the Sunk near Trieben, Styria, Austria.
The geology.
Pinolith carries the formula (magnesite + graphite/dolomite). It belongs to the, system. Its listing category is metamorphic (magnesite-graphite rock).
It sits at 3.5 to 4.5 (aggregate) on the Mohs scale. The surface reads dull matrix with pearly white grains. Light behaviour is opaque. Specific gravity runs 2.9 to 3.0. The streak is white to gray. It breaks with uneven fracture.
Black-and-white signature stone: rice- to pine-nut-shaped white magnesite grains scattered through dark graphite matrix like grains in pumpernickel.
It turns up mostly as polished slabs, tumbled, palm stones or beads.
The origins.
Essentially one source: the Sunk near Trieben, Styria, Austria.
On value, the database notes: mid-range; a single-locality conversation stone.
Traditional associations.
In energy work traditions, associated with balancing opposites and quiet optimism.
This is lore, and we label it as lore. The measurable facts are further up the page.
Spotting the real thing.
Black-and-white signature stone: rice- to pine-nut-shaped white magnesite grains scattered through dark graphite matrix like grains in pumpernickel.
| Looks like | How to tell them apart |
|---|---|
| Snowflake obsidian | Obsidian is glass with fuzzy gray rosettes; pinolith's white ovals are discrete crystals in soft stone |
| Dalmatian stone | Inverse palette, dalmatian is cream with black dots |
| Zebra stone | Zebra forms stripes, not isolated 'pine nuts' |
At-home tests.
A loupe and a window seat settle most questions about pinolith. No workshop required.
| Test | What you should see |
|---|---|
| Acid check | White grains fizz in warm vinegar (magnesite) |
| By eye | Dark matrix can mark paper faintly (graphite) |
| Scratch check | Knife scratches it |
Anything that scratches, burns or dissolves the piece is a lab job. Get it appraised rather than testing it apart.
Care & handling.
At 3.5 to 4.5 (aggregate) on the Mohs scale this is a soft material. Keep it as a display piece, store it apart from harder stones, and skip daily-wear settings.
It breaks with uneven fracture, which is worth knowing before you set it or drop it.
Warm water and a soft cloth clean almost everything. Ultrasonic tanks, steamers and household cleaners are where pieces get ruined.
A deeper look.
Extended detail on composition, sourcing, authentication and market value.
The physical record
The formula on record is (magnesite + graphite/dolomite). Crystal system:,. Specific gravity: 2.9 to 3.0. Streak: White to gray. Cleavage and fracture: Uneven fracture.
How it reaches the market
Essentially one source: the Sunk near Trieben, Styria, Austria.
What it gets confused with
Snowflake obsidian: Obsidian is glass with fuzzy gray rosettes; pinolith's white ovals are discrete crystals in soft stone. Dalmatian stone: Inverse palette, dalmatian is cream with black dots. Zebra stone: Zebra forms stripes, not isolated 'pine nuts'.
What it is worth
Mid-range; a single-locality conversation stone.
One more thing
Austria's pinolith was mined historically for magnesite refractories, lapidaries rescued the leftovers and made it a national signature stone.
An education-first guide.
No product links here. We do not sell pinolith, and a guide that only covers our own shelves would not be much of a guide.
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