Like I said before, buy me a plane ticket and I will show you in person my tool kit
Yes, the spade is completely worthless when collecting from solid rock; the blunt blade is coming close but sounds way too weak to get the job done. You need a flat steel wrecking bar, the kind construction guys use to do demolition work when re-modeling houses. They cost less than $5 U.S. at a Home Depot or a Lowe's. Get the size that you can easily carry in your backpack but will be long enough to reach the bottom of the hole or crack.
There. I've given it all away now
The only thing left to do is invite me there and I'll dig it for you
