This is a nice meteorite iron, from (I believe) Nan Tan, China. We used this one in Metatron's energy layout to symbolise his hammer - the tool of dissolution and change - of breaking something down and / or reconstructing it. This is very much how it can be used, but it is not a stone for the faint-hearted!
Size: 1.5 x 1.25 x 1 cm