Stones In Coffee: An Ill-Advised Investigation

Note: All stones used in the testing came from the destoning of raw coffee - so are good indicators of the kinds of stones you might find in a bag of roasted coffee. What happens if a small stone makes its way into your bag of coffee and your grinder? An irreversible calamity or an imperceptible event? My 1 Cup V60 technique: https://youtu.be/1oB1oDrDkHM Our new pour over setup still life print from TensHundredsThousands: https://geni.us/THT-Still-Life 0:00 Intro 1:38 How do roasters filter stones out? 3:52 Our test parameters 4:46 Testing pt. 1 10:39 Burr inspection (with a microscope!) part 1 11:12 Testing pt. 2 12:02 Burr inspection (with a microscope!) part 2 12:31 Testing pt. 3 13:09 Particle size analyser results 16:41 What to consider if it happens to you 18:30 Testing pt. 4 21:49 Taste test Other Links: Patreon: https://www.patreon.com/jameshoffmann Limited Edition Merch: https://geni.us/TensHundredsThousands Instagram: https://www.instagram.com/jimseven Twitter: https://www.twitter.com/jimseven My Books: How to Make The Best Coffee At Home*: https://geni.us/howtomakethebestcoffee The World Atlas of Coffee*: https://geni.us/worldatlasofcoffee The World Atlas of Coffee Audiobook*: https://bit.ly/worldatlasofcoffeeaudio The Best of Jimseven*: https://geni.us/bestofjimseven Things I use and like: My old glasses: http://bit.ly/boldlondon My new glasses (Sept 2024 onwards): https://bit.ly/thenewglasses My hair product of choice*: https://geni.us/forthehair (*Affiliate links which may earn us a commission)