76 mm Dendritic Agate from Eskişehir, Türkiye
Eskişehir, Anatolia, Türkiye
Size: 70x100x34 mm (260,3 gr.)
Beautiful dendrites on blue/white agate.
This specimen is extra rich with manganese/iron silicates, making a big black layer at the rim.
The term "dendrite" comes from the Greek word dendron (δενδρον), which means "tree", and they are made of manganese/iron silicates.
For more explanation of the occurrence, please read my blog post:
Also please watch the video above. It can also be found on youtube: