Lundgren Memorials in Seattle produces headstones made from glass—glass so thick that "you can take a baseball bat to it," says owner Greg Lundgren. (Given the price tag, you should probably just take his word on that.)
"It's a very conservative industry," Lundgren said, "and I think it takes a lot of time for people to digest what we're doing and understand what we're doing."
Education is key, he said. Glass, which isn't corrodible or stainable, is more resilient than granite -- though they both contain high levels of the mineral silica and can chip.
And just like windows on a house or skyscraper, glass monuments won't crack in cold weather or melt when it's warm. [Link]