Technically Rockhound is a Platinum trophy, because you can't get the Platinum without it. If you are still missing 60 shards, then it doesn't seem like you have suffered enough. Try searching all 3 districts for the final two shards for 5 hours. If you are going to play through the game again, I would recommend starting over with your shard collection. The most important thing you can do is keep a count of your shards by district (Total shard count: 147 Neon, 68 Historic, 135 Warren). That way you will know which district still has shards. Also, in the Historic district, there are 2 buildings that the shard will only show if you climb the building (same thing with the prison in the Warren). Also, there is a shard on the broken Alden bridge accessible from the Historic side, and there is a shard on a broken pier in the Neon (both are hard to spot on the radar because they blend in with the water.
Thanks for the input, Jeff.
