I get asked this a lot so easier to put here.
Does anyone have a list of natural pigment sellers that they regularly buy from? Eg from Etsy - some people mentioned that they buy pigments from Etsy. It would be good to share if possible!
For the UK (but they may ship internationally) and later if you want to browse in store as colours are best seen in real life:
AP Fitzpatrick: they have exclusive relationships with some colour suppliers (and I'm happy that they also stock my brushes!) and knowledgeable staff, practising artists
Cornellissen: a Harry Potter of a shop, a real rabbit hole to get lost in dreaming in... they stock some colours and gums and weird and wonderful resins (ok this is for oil painting and other things but oil painting can also be used for miniature style) used in medieval times and earlier (dragon's blood! smalt!) and knowledgeable staff, practising artists
Some friends, and friends of friends, and gifts... although since there are issues with shipping/leaving the country they are not always easy to obtain.
If there are equivalent shops in your own country, please add to this list!