 So now we're going to talk about the virtual mineral simulation. And this is an application I found online that uses flash. Unfortunately, flash is being phased out. So in order to still be able to use this content, rather than you guys going in interactively to do these experiments, I'm going to go ahead and record the simulation. And then you'll be able to answer your question based on these videos, even after flash goes away and the original simulation is no longer available. So we've got a set of mineral samples here. And then we've got testing equipment. There's a lamp. There's an unknown liquid with a pH of 2, which means it's an acid. There's a little eyedropper we're going to be able to use with the acid. There's some iron filings and a magnet. There's a hammer and chisel. There's a magnifying glass. There's a porcelain streak plate. And then there's a set of reference samples for hardness. And for each one of these minerals, we're going to be able to perform some observations or experiments in order to better understand the properties. Now just so you guys can tell, because it's a little hard to read with a resolution on the screen, this first one is calcite, then it's mica, quartz. So here we have sulfur, magnetite, pyrite, and then an unknown sample. And these are the samples that are going to be tested in the videos that we're going to do. Now we're not going to do every test that's available in here, but we're going to be doing some of them. So use these videos to help you answer the questions in the lab manual if you're one of my students. Otherwise you can just watch the videos to learn more about some of these minerals. If you have any questions, contact me.