Agate is a micro crystalline variety of silica,chiefly chalcedony,characterized by its fineness of grain and brightness of colour. This particular agate came from the shores of Lake Superior in Michigan. Specimen Dimension: approximately 4 cm | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Kinsman, Ted |
Taille de l’image : | 5616 px × 3744 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : |
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