My rocks required extra rounds especially for the rock I used thread on…

For the flower rock, I used the Patons Silk and G hook after last round, I Ch 6, sk next st, DC in next, ch 3, sk next st, DC in next st - around.

For the star rock/green crochet thread, I used a 2.25 m hook and had a few extra rounds…

Next Rnd - Sl to CH 8 space, 4 DC, 3 Ch, 4 DC in each Ch 8 sp around, join
Next Rnd - Ch 5, SC in Ch3 space, Ch 5 sc in ‘space’ created between last DC in Ch 8 sp and first DC in next Ch 8 space - repeat around, join
Next Rnd - sl st to ch5 space, 5 sc in each ch 5 space around, also, in each sc that was crocheted in the ch3 space of previous round, I added an extra sc with picot
Next Rnd - sl to 3rd sc, ch 10, sc in 3rd sc after picot, ch 5, sc in 3rd sc in next group of sc - around, join
Next Rnd - sl to middle of ch 10 space, ch 10, sc in next ch 10 space around, join