élimination (1) particule (1) île (1) industrie du verre (1) verre (1) substance chimique (1) céramique (1) ordre (1) Sphene (1) Igneous rocks (1) Phenocrysts (1) Oxides (1) Order (1) Mica (1) Manufactures (1) Magnetic separation (1) Glass trade (1) Glass manufacture (1) Glass (1) Examinations (1) Ceramics (1) Aegean Sea (1) Use (1) Size (1) Quality (1) Inclusions (1)