The crocheted pebbles below are by Margaret Ooman, whose work and lovely nature images you can see more of via her lovely blog Resurrection Fern.
Sadly her etsy shop is currently closed but there are other talented and like minded souls out there doing similar. So if like me you covet these but as yet lack the skills to pull it off yourself there is a way to make them yours. Below is a favourite from etsy store Monicaj. If you have the skills (please teach me - I will bake) here is a tutorial via craft blog purlbee.com to do the same.