Collect the indicated number of Rhythmia to unlock the corresponding set of shards. After reaching 9,750 Rhythmia, you will get random color Crystal Shards at every 1,000 to 1,500 Rhythmia interval.

Gold Crystal Shard x6: 8,250 Rhythmia
Green Crystal Shard x4: 2,750 Rhythmia
Indigo Crystal Shard x4: 1,250 Rhythmia
Orange Crystal Shard x6: 6,250 Rhythmia
Pink Crystal Shard x6: 4,000 Rhythmia
Red Crystal Shard x4: 250 Rhythmia
Silver Crystal Shard x6: 9,000 Rhythmia
Turquoise Crystal Shard x6: 6,750 Rhythmia
Violet Crystal Shard x6: 4,750 Rhythmia
White Crystal Shard x6: 7,750 Rhythmia
Yellow Crystal Shard x4: 2,250 Rhythmia