mineraloid (human-made geological specimen)

Fordite

Anthropogenic paint-rock

Hardness (Mohs): 2-3 (relatively soft); Color: Vibrant, multicolored layers (red, yellow, blue, teal); Luster: Glossy or resinous when polished; Structure: Layered/accreted stratification.

Color: Vibrant, multicolored layers (red, yellow, blue, teal)
Luster: Glossy or resinous when polished

Identified May 23, 2026More mineraloid (human-made geological specimen) →

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Physical properties

Hardness (Mohs): 2-3 (relatively soft); Color: Vibrant, multicolored layers (red, yellow, blue, teal); Luster: Glossy or resinous when polished; Structure: Layered/accreted stratification.

Formation & geological history

Formed through the buildup of automotive enamel paint in car assembly plants. Layers were baked repeatedly as different colored cars were painted in spray booths. Most material dates from the mid-20th century.

Uses & applications

Used primarily in jewelry-making for cabs, pendants, and rings; also popular as a lapidary curiosity for collectors.

Geological facts

Also known as Detroit Agate or Motor Agate, it was formed in a process that no longer exists due to modern electrostatic painting methods, making it a finite and dwindling resource.

Field identification & locations

Identify by distinct, thin, multicolored stripes that resemble sedimentary bedding but in unnatural neon/primary colors. It smells slightly like chemicals when cut or sanded.

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