Review on AQUA UA 1030M Stone Wall Medium by Ann Montana

I bought 6 of these and 1 of them broke in half. It's made of ceramic and can easily break if you're not careful considering how light it is. I bought this to create a mound in my planted tank, but since it's about 1/2" thick I'm concerned it will show when the gravel flattens out. Perhaps I could have made it myself and used flexible plastic But most of all I find it too expensive for what it's really worth.