I've been sieving my beans to remove any chaff before I bag and freeze. I mainly do it to make preparing coffee that little bit nicer. Excessive chaff seems to mess up my extraction or just cling to things and get messy.
This was what I was left with from sieving about 200g of coffee. There's not much chaff from this coffee, a few broken beans and a couple of stones!

Here's a close up of the stones next to a broken coffee bean as reference.

I've been grinding my own beans for years and have never had a problem. I've heard of people finding stones in their coffee before but it sounded too rare to worry about. To get two stones from a single 1kg bag of coffee was incredible. I'm not sure what damage this would have done to the grinder but I'm happy not to find out. It's safe to say that I will be continuing to sieve my coffee.
Has anyone else found foreign debris in their coffee? Does anyone else sieve?
This was what I was left with from sieving about 200g of coffee. There's not much chaff from this coffee, a few broken beans and a couple of stones!
Here's a close up of the stones next to a broken coffee bean as reference.
I've been grinding my own beans for years and have never had a problem. I've heard of people finding stones in their coffee before but it sounded too rare to worry about. To get two stones from a single 1kg bag of coffee was incredible. I'm not sure what damage this would have done to the grinder but I'm happy not to find out. It's safe to say that I will be continuing to sieve my coffee.
Has anyone else found foreign debris in their coffee? Does anyone else sieve?


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