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Oxides

TiO2 Polymorphs
TiO2 Polymorphs 		Hematite, Egremont, Cumbria Florence Mine hematite rose, 44mm specimen Eisenkiesel, red quartz on hematite. Florence Mine, Cumbria, 16 cm.
Hausmannite crystals (to 2 mm) with manganite on 10 cm matrix. Wyndham Mines, Bigrigg, West Cumberland Iron Field Cyclic cassiterite twin, 15 mm, Bunny Mine, St. Austell, Cornwall. Cyclic cassiterite twin, 15 mm, Bunny Mine, St. Austell, Cornwall. Dipyramidal cassiterite crystal, 2 cm, Burma
Rutile Azerbaijan.jpg 5 mm brookite crystal, with quartz and albite, Twll Maen Grisial, Fron Olau, Prenteg, Dolbenmaen, Gwynedd Prenteg brookite model with Millers Anatase from Twll Maen Grisial, Fron Olau, Prenteg, Dolbenmaen, Gwynedd, about 2 mm across
Crystal model for Prenteg anatase Anatase on albite, Hendre Quarry, Glyn Ceiriog, Denbighshire, 40 mm x 20 mm x 15 mm

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