| ▲ | chasil 8 hours ago | |
Maybe try copper sulphate? https://crystalverse.com/best-way-to-grow-copper-sulfate-cry... Crystal growth has been on here before. Let me see if I can find a link or two... https://news.ycombinator.com/item?id=31105320 https://news.ycombinator.com/item?id=30487511 | ||
| ▲ | allan_s 7 hours ago | parent [-] | |
I did that with my kids and it was pretty cool ! | ||