Comment Comment by gilleain Sodium-ammonium tartrate (I remembered what you were talking about, but had to look up the actual chemical!)https://pmc.ncbi.nlm.nih.gov/articles/PMC9291139/From that:"To his surprise, he noticed that each crystal has a tiny facet on one of its edges oriented sometimes to the right and sometimes to the left. He could separate them by hand with a tweezer." parent gilleain 1 month ago
https://pmc.ncbi.nlm.nih.gov/articles/PMC9291139/
From that:
"To his surprise, he noticed that each crystal has a tiny facet on one of its edges oriented sometimes to the right and sometimes to the left. He could separate them by hand with a tweezer."