Talc. Section through a sample of talc (or talcum) showing its layers. Talc,hydrous magnesium silicate,is the softest known mineral and is number 1 on the Mohs hardness scale. When ground up into fine particles,it is sold as 'talcum powder' and used as a drying agent. Talc is usually massive or 'foliated' (in sheets) and has a pearly luster and a 'soapy' or greasy feel | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Wiersma, Dirk |
Taille de l’image : | 4724 px × 3754 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |