Purple sandstone is definitely the cousin of tan. It gets its coloration from purple hematite, as well as consistent oxygen exposure giving it that brick-like visual appeal. The hematite sorts around the eons because the minerals full of iron will start to oxidize or rust, and ultimately coat the quartz https://zaneqqpng.articlesblogger.com/53890179/facts-about-sandstone-retaining-wall-blocks-revealed