Hooray! They arrived!
I'm so glad you've recieved them, and super glad that you're pleased!
Be careful with the acid. Actually, I used something I got at Wal-Mart called Iron-Out. It's much safer and nowhere near as hard on them.....99% of your pieces will come totally clean this way. It's a powder, and about $6 a jug. Use the water hose to first remove as much of the clay as you can, then take a plastic bucket and add warm water and add your Iron remover.. then very carefully add your crystals. It's okay to put larger pieces on the bottom and set some of the smaller points and things on top. But if the clusters have smaller crystals, be sure not to set anything on them that will break some off.
If you're getting sunny days, let the buckets sit outside in the sun for a few days.... I, personally, couldn't let mine be,,I was so excited I checked on them every few hours to monitor their progress....
Then I took a toothbrush and gently cleaned them. Most of them came clean. For the stubborn ones, or the clusters with dirt in the crevices, let them dry and then re soak them. use a bottle brush if needed (the bristles are longer) to gently get into the crevices....... Some are almost impossible and they need to be done many times,,,(As they dry, the clay in the cracks shrinks and get smaller and easier to get out). I have one cluster that I've been working on for over a month.
When all else fails, a little bit of the acid will help, but be careful. Some of the crystals have what looks like granite connected to the bases sometimes. The acid will make the granite turn a hideous green,,,,,,,
Best of luck!
By the way,, just wanted to let you know that even when you are at the dig site, a LOT of the crystals you find will be imperfect or broken. You probably dig 5 or 6 before you find one that is pristine. Like you, I use the broken pieces in other ways, some used to decorate my potted plants and others go into the rock tumbler where they come out gorgeous!
Since you're going to be travelling with yours, you might prefer to wash them at the mine and find the good ones so then you don't end up bringing home a lot of broken pieces.
I'd love to see pictures when you're finished!