We use all of the resources we find, but we don't use them often as the meteors are rarer to find due to the sand and worms. That said, much of what we use comes from off-world and the worms.

( Raising a hand to her chest, Rey carefully shifts through the loose fabrics she wears to produce a necklace. With a deft hand, she pulls it over her hand and hands it to Paul once he's sitting beside her. )

I kept a small piece of the last one I found.