I was told one gram.Sorry if you already answered this but how much do you need of a raw to properly test it like a gram or 0.3 etc.
However, I did not weigh my personal samples and the ones I have received have been in varying quantities.
What I did, and what I have passed on to people that have sent samples is a rounded scoop from my lab spatula.
Around about 1/3tsp +or-.
If you look at the pics I posted at the beginning of the thread it may give you an idea.
If you want to weigh it; then 1 gram is sufficient because that is what I was told.
But I couldn’t imagine sending in a gram of something like Halo raw powder for testing. That would be too expensive.