Is it possible to revisit the 'Silent Realm' after completing a trial?

I'm running low on Dusk Relics and want to get more. The Silent Realms are a good source for this rare treasure.

Would it be possible to revisit one of the Silent Realms after completing the trial so I may get more of these?

Solution 1:

From this thread:

Later during the game you will be able to revisit silent realms you've completed.

If you need the dusk relic treasure, there is a Sheikah Stone in a cave in Skyloft (the first cave you go to find your Loftwing). There should be a flock of butterflies there. Play your harp and a Sheikah stone will emerge and will sell any treasure you want.

Bring lots of money though, they're 100 Rupees each.

Solution 2:

It's worth mentioning how exactly we may revisit the realm. You can't go through the trial entrance like before, those are actually no longer available.

After healing the Thunder Dragon, he'll recreate two different challenges for you, the Boss Rush mode which allows you to battle the first 8 previous bosses in the game or timed runs through the Silent Realms. You can pick up and keep the Dusk Relics you find in the challenge.