ID 20468
 
Dark green (almost black) crystals of vivianite on goethite matrix.
The size is 27x38x28 mm (23,8 gr.)

If you use very strong light (like I did on the first picture) you will see that some of the crystals are tanslucent green.

No damages, and a nice specimen.
 
My father bought this one a long time ago, probably 20-30 years ago.