Hi all, I been playing around with some small test blocks of RE. Mine look like a solid color. I was wondering if anyone knows how to get the striations. I read iron oxides are used so I checked a local pottery shop that sells them. Price will range from $7/lb. (e.g, red or black) to $10/lb. for red or orange. I got no idea the cost for all the walls in a 1500 square foot house. https://www.masoncolor.com/pigments/pigments.asp We are investigating the MSDS, one has chromium a known toxin. Some paint pigments use iron oxides with toxins. Just wondering if anyone has more natural lower cost ideas and if anyone knows the technique to get those beautiful striations. All I can think is sprinkle the power to the form side as I tamp, but some look like they crawl up and down the walls in certain areas. I attached some pics, you can see what I mean. My sample is still wet, just pulled the forms, it may lighten a little.