Regardless of where I procure my chia seeds, I always find, mixed with them, some quantity of smaller and darker seeds which doesn'tdon't seem to be chia.
These seeds are black (noticeably darker than the dark-gray chia seeds) and lentil-shaped, about 1mm in diameter. They don't gel in water like the chia seeds do.
What are these seeds? How safe are they? Should I make an effort to get them out?
Here's a sample, the 3 little seeds on the top right are the kind in question, the rest are chia: