Here I have a unique, unusual complex mineral from Russia, which looks like shine flaking glass (although it does not flake). I was not able to find an English name for it, but the Russian name of the mineral is Слюдит (сланец). You can sometimes see bits of this sparkly mineral in manmade quartz countertops. It's also used for sculpting objects, creating artsy windows and making jewelry. I only have one available.