The Wild Terra Steam page has been updated with a blog post dedicated to the Warp Crystals. This most recent post is an addition to an earlier one detailing upcoming Corrupted Lands, which will feature new monsters, resources, terrain and more.
The Warp Crystals are the reason for existense of the Corrupted Lands: they distort flora and fauna around them and change terrain. The Perfect crystal can be broken for shards that can be mined and planted on players' plots. Players will have to put in a lot of effort to coax the crystal to grow.
The team will be adding more information about this process, but you can get an idea of the basics on the Wild Terra Steam portal page.