No - not from appearances alone.
A couple of things to try:
- lick it - does it taste salty?
- does it scratch glass (obviously don't try it on a good window pane or mirror!)
Also, where did it come from?:
- particular locality in S. Somalia, and
- was it in situ (in the original outcrop) or loose (eg. on a beach)
Thanks for the reply.
I've tasted the rock, does not tast of salt and it does scratch glass.
As for the exact location and condition i'll confirm shortly. Its not from the beach.
Don't worry about the location; the hardness pretty much gets us there.
Window glass has a scratch hardness of 5.5.
Since your specimen scratches that, it is harder.
It is almost certainly granular pink quartz (hardness 7), though it could be orthoclase feldspar (hardness 6).
Quartz is more likely because it is much more common for granular quartz to occur in pure masses (like yours) than orthoclase. The translucency also makes quartz more likely. From what I can see of the fracture surfaces, I think quartz is also a better fit on that basis.
There are other minerals harder than quartz, which are possibilities on the basis of scratch hardness alone, but they are much less common, especially in pink forms.
For reference: Mohs Scale of Scratch Hardness