About a week ago we popped a rock into some vinegar. Today, this is what we have:
That's a horrible picture but my cheap little digital camera isn't so good with close ups. Anyways, the rock has now grown crystals. Crystals also line the 'high vinegar' line of the bowl.
The rock is from a Popcorn Rock kit we bought at a museum. the packaging says the rock is argonite but has no information on the process of the crystal growth. Some Internet searches have turned up little.
Anyone familiar with this and have a good explanation or link I could use with the kids?