Fig. 1From: Quantitative mapping of trace elements in agate using LA-ICP-MSTwo fortification agate samples. They are oval in shape with approximately 50-mm-long major axes and are characterized by a colorful and b bluish banding layers, respectively. The former varies in color, from gray through orange and red to brown towards the center. On the other hand, the latter consists of bluish chalcedony alternating with white microcrystalline quartz. Open rectangles represent the areas of ablationBack to article page