Which of the following minerals is not a regulated asbestos mineral?

• A. Chrysotile
• B. Crocidolite
• C. Anthophyllite
• D. Talc

Answer: (D)

Asbestos minerals are specific minerals that form fibrous, durable fibers capable of becoming airborne and being inhaled, which drives the health risks and regulatory controls. Among the minerals listed, chrysotile and crocidolite are classic asbestos minerals (serpentine and amphibole groups, respectively), and anthophyllite is also recognized as an asbestos mineral in regulatory lists. Talc, on the other hand, is a different mineral (magnesium silicate) that does not have the fibrous asbestos crystal habit, so it is not classified as an asbestos mineral. Regulators focus on asbestos minerals because of their established link to lung diseases, though talc products can be scrutinized for asbestos contamination where relevant.