Green shards appear normally on the ground. 30 spawn, but you only need to collect 25.

Gold shards appear as twinkling white stars on the ground. 30 spawn, but you only need to collect 25.

White shards can be found by a player sitting on a cactus at the locations marked on the map. You need to collect all 15.

Blue shards can be found by a player bringing a watering can to the ponds at the locations marked on the map. You need to collect all 20.

Purple shards can be found by four players sitting on a series of arches at the locations marked on the map. These must all be done in sequential order, and your group needs to activate 6 arches to obtain 1 shard. You need to sit on 30 arches to collect all 5.