Crystals of haematite in quartz. Hematite (black,centre) is a variety of iron oxide (Fe2O3),mined as one of the main ores of iron. The specimen shown here has a bulbous appearance,also referred to as botryoidal (grape-like). It is a small specimen,less than a millimetre across. The surrounding mineral (white) is quartz,a form of silica (silicon dioxide,SiO2). This specimen is from St Just,Cornwall,England | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Bishop, Jeremy |
Taille de l’image : | 5171 px × 3425 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |