You also get shards and diamonds from guild tasks 
The coloured jewels only come from dungeons though.
I think this thread might have the current info: 3.1 Guild Task Rewards - Pending Updates (up to 3,000 shards and 150 diamonds per week).
You also get shards and diamonds from guild tasks The coloured jewels only come from dungeons though.
I think this thread might have the current info: 3.1 Guild Task Rewards - Pending Updates (up to 3,000 shards and 150 diamonds per week).