Controversial, this is because not everyone agrees that they make excellent pets
Answer:
5 gemstones
Explanation:
There are 60 gemstones and there are 6 groups to which the gemstones are distributed equally.
So, each group will have

Now, out of the
groups one group is taken and split into two equal halves so the halved group will have

So, each friend will have 5 gemstones.