Picasso Jasper
Picasso Jasper is metamorphic (marble with oxide veining). In the hand, it rates 3 to 4 on the Mohs scale, and it runs gray and cream. Soft gray-cream stone slashed by abstract black and dark-brown lines like a cubist sketch; despite the jasper name it is a marble and a knife will scratch it.
The geology.
Picasso Jasper carries the formula CaCO3 (calcite) with iron-manganese oxide veins. It belongs to the not applicable (rock) system. The trade files it under metamorphic (marble with oxide veining).
It sits at 3 to 4 on the Mohs scale. The surface reads satiny to vitreous on polish. Light behaviour is opaque. Specific gravity runs 2.7 to 2.85. The streak is white. It breaks with uneven, granular fracture.
Soft gray-cream stone slashed by abstract black and dark-brown lines like a cubist sketch; despite the jasper name it is a marble and a knife will scratch it.
Common cuts are tumbled, beads, palm stones or cabochons.
The origins.
Classic material from Beaver County, Utah, USA; similar marbles from Mexico and China.
On value, the database notes: common and affordable.
Traditional associations.
In energy work traditions, associated with creative breakthroughs and renewing artistic discipline.
Included for completeness. Tradition is worth knowing about, and it is worth keeping separate from the mineralogy.
Spotting the real thing.
Soft gray-cream stone slashed by abstract black and dark-brown lines like a cubist sketch; despite the jasper name it is a marble and a knife will scratch it.
Honest stone, dishonest name: it is marble, not jasper, so keep it away from acids and rough wear.
| Looks like | How to tell them apart |
|---|---|
| True jasper | Jasper scratches glass; Picasso 'jasper' is calcite-based and scratches with a knife |
| Septarian | Septarian shows brown-yellow infilled cracks and nodule structure; Picasso lines are thin oxide films |
| Spiderweb obsidian | Obsidian is glassy with conchoidal fracture; Picasso marble is granular and matte |
At-home tests.
These checks cost nothing. Daylight, a 10x loupe and a little patience are the whole kit for picasso jasper.
| Test | What you should see |
|---|---|
| Scratch check | Knife scratches it easily (Mohs 3 to 4) |
| Acid check | Fizzes with vinegar (calcite) |
| By eye | Black lines are flat films along healed fractures |
Stop short of anything that leaves a mark. A gemologist can answer the rest without damaging the stone.
Care & handling.
At 3 to 4 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, granular fracture, which is worth knowing before you set it or drop it.
Skip the ultrasonic. Lukewarm water, mild soap and a soft cloth handle routine cleaning without risk.
A deeper look.
Extended detail on composition, sourcing, authentication and market value.
The physical record
The formula on record is CaCO3 (calcite) with iron-manganese oxide veins. Crystal system: Not applicable (rock). Specific gravity: 2.7 to 2.85. Streak: White. Cleavage and fracture: Uneven, granular fracture.
How it reaches the market
Classic material from Beaver County, Utah, USA; similar marbles from Mexico and China.
What it gets confused with
True jasper: Jasper scratches glass; Picasso 'jasper' is calcite-based and scratches with a knife. Septarian: Septarian shows brown-yellow infilled cracks and nodule structure; Picasso lines are thin oxide films. Spiderweb obsidian: Obsidian is glassy with conchoidal fracture; Picasso marble is granular and matte.
What it is worth
Common and affordable.
Where buyers get caught
Honest stone, dishonest name: it is marble, not jasper, so keep it away from acids and rough wear.
One more thing
The 'drawings' are records of tectonic stress: micro-fractures opened, oxides crept in, and the marble healed, keeping every pencil stroke of its history.
An education-first guide.
We do not carry picasso jasper. This page exists because the question comes up and the honest answer is worth writing down, whether or not there is anything here to sell you.
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