Guild Wars 2

I need help with obtaining a vision crystal. I am trying to finish the druid stone achievement just so I can be done with it. I have gotten at least 2 vision crystals at one point in time but I accidentally salvaged one and I have used the other for calaborg. I don’t want to craft one so how can I get one from just doing achievements?

There is two reliable ways to get Vision Crystal without crafting it. One is to chose Chest of Ascended Crafting Materials in Chest of Loyalty you get on 30th day of logging in.
Other is to do all dungeon skins and get it from Dungeoneer’s Grandmaster Chest. There is a chance of dropping from bags you get when you feed eaters but I think that chance is so low, I wouldn’t count on it.

All info is here https://wiki.guildwars2.com/wiki/Vision_Crystal

As was said above, the only achievement that will give a Vision Crystal is the Dungeoneer achievement, which you get for collecting every armor and weapon piece from every dungeon. You can wait until you’re at your 30 day log-in reward; choosing Ascended Materials always gives you a Vision Crystal. I think salvaging certain ascended equipment (just armor and weapons, perhaps) can give you a Vision Crystal, as well.