The granulites are very closely allied to the gneisses , as they consist of nearly the same minerals .
Granulites are finer - grained , have usually less perfect foliation , are more frequently garnetiferous , and have some special features of microscopic structure .
The granulites are very closely allied to the gneisses , as they consist of nearly the same minerals , but they are finer - grained , have usually less perfect foliation , are more frequently garnetiferous , and have some special features of microscopic structure .