Fig. 4From: The global variability of diatomaceous earth toxicity: a physicochemical and in vitro investigationSEM images of examples of DE morphologies. a disc-shaped DE found in Chilean, Chinese, Mexican and Spanish samples, b cylindrical diatoms found in French and USA-2 samples, c fibre-like rods (black arrows) and diatom rinds (white arrows), and d a large agglomeration of fused diatoms in a flux-calcined DE sampleBack to article page