I've had quite a few of these strange things happen. The most rock solid of these (literally) happened while I was trying to hitchhike in the country near Eugene Oregon. I was sitting on the side of the road with my friend trying to get a ride. I was bored and picking random gravel rocks off the ground, fiddling with them and putting them back. After a few hours we gave up and decided to play in the river down the hill. I walked about a mile through the creek bed playing in the waterfalls along the way when I found a cool rock in the river. It was a plain grey stone shaped like a spoon with a piece broken off where the handle would be. A week later I was thinking about using some clay to finish the claw shaped handle. I was digging in my pockets and found a small piece of gravel that I must have picked up on the side of the road. It was about the right shape to fit the spoon rock. I tried it out and it fit perfectly, and I mean it was the missing piece, somehow it must have broken off and ended up a mile away from it's other half, and fate led me to find them both. It completely blew my mind. My friend was with me when all this occurred and agreed that it was legit