Dolomite

Dolomite is a common carbonate rock and mineral made of calcium magnesium carbonate. It isn't asbestos itself, but deposits of dolomite and related carbonate rock can contain veins of tremolite and other amphibole asbestos. Crushed dolomite is widely used as aggregate, road stone, and filler, which can carry that contamination into products and dust.

Origin

Named in 1791 after the French geologist Déodat Gratet de Dolomieu, who described the rock in the Alpine range now called the Dolomites. The mineral and the rock made mostly of it share the name.

Significance in Asbestos Context

Dolomite matters because it can be a hidden carrier of asbestos. Tremolite and other amphibole fibers sometimes form within or alongside carbonate rock, so quarried and crushed dolomite used as aggregate, filler, or stone can be contaminated. That's one route by which people are exposed without ever handling an obvious asbestos product. For a patient, identifying contaminated mineral sources can matter in tracing exposure, and it connects to provenance work that ties fibers found in the lungs or a product back to a geologic source.

Example Sentence

Testing of the crushed stone from the quarry showed tremolite in the dolomite, which explained how the road crew was exposed despite handling no manufactured asbestos.

Related Terms

Tremolite, Amphibole, Talc, Provenance Analysis, Contamination

Notes

• If exposure may have come from stone, aggregate, or mineral fillers, note the source, since dolomite and related rock can carry tremolite.
• Ask whether any fiber analysis identified tremolite, which points toward a natural carbonate or talc source rather than commercial asbestos.
• Preserve records identifying the specific mineral products or quarry sources involved.