It's a sativa dominant hybrid, pure Sativas are rare enough that you would know if you had one. Those calyxes have not even swollen yet, 6 weeks would be alright but I'm assuming most of these cats grow hybrids, probably more Indica dominant because most people won't wait the proper amount of time for a Sativa to love them back. If you want to harvest her when she's truly ripe, you could be looking at 8 or 9 more weeks. That is also strain and pheno dependent... as well as has much toi do with their growing environment.