This is for a very nice lady who asked for the pattern of the coasters 🙂
Dear Barbara, here they are:

First: Flower coaster

It is made with 5 rounds , every round with a different color:

and the star coaster:

I take this pattern from a very nice crochet book:  Beyond the square crochet motifs

It is a very lovely book with very simple and nice motifs.

Here is the pattern:

I hope that it is easy to understand…

Happy crocheting to you all!