Zachary Quinto has posted another photo to his Instagram account, this one showing a variety of wigs to be used in Star Trek Beyond.
There are six wigs in the photo.
The wig to the left of Quinto looks like a wig that would be used on a Vulcan (or perhaps a Romulan), while the other two wigs on that same level appear to be human wigs.
On the top row, there is a shaggy wig, and a white pony tail. TrekToday reported last week that the brunette Sofia Boutella was seen around Vancouver with a long white ponytail, so perhaps this one is for her.
The last wig, on the bottom row, is dark and appears to be made for someone with a high forehead.