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Rumbling [Gem Guide]
Forum-Index → Help → Guides → Rumbling [Gem Guide]Are you sure they are Dragon Gems? To my knowledge you are not able to get Dragon Gems from rumbling missions?
If all those gems became more common, then other items would then decrease in value too. Like mega stones. Mega stones are boiled using 5 of each gem. If they were easier to get then mega's would be easier to create and so on. It is more of a challenge when some items are more rare than others.
The Final Map update can give you the chance to battle the Galarian versions of Kanto's Bird Trio (and get their Summon Item).