Tanked Posted March 9 Share Posted March 9 Like many of us on these forums I spend a lot of time staring at the ground looking for that next piece of hardscape. The habit started long before my first aquarium. Rocks are inexpensive souvenirs. A childhood trip to the natural history museum got me interested in glowing rocks, and UV light in general. I have several "black lights". They are useful for finding car keys lost in the yard as well as all of the suggested uses. I'm looking for a battery operated light in the 365nm. range, $10- $50. Do you uses one? Is it reliable? After watching a few videos on cleaning crystals, geodes, and the like, I decided to "clean" some of my geodes hoping to find something better underneath. I used muriatic acid to clean a few test pieces, and a baking soda solution to neutralize the acid The results were disappointing, but I wasn't expecting much. One geode fragment did come out as a bright white. This is where the problem started. Over the next few days the test rocks began to turn yellow. Can this be reversed? I don't have any really great specimens, so I don't want to ruin the few good ones that I have. Link to comment Share on other sites More sharing options...
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