At the G-Shock 35th Anniversary Celebration, which took place at Madison Square Garden in 2017, Casio revealed a sapphire crystal watch.

Shown in square-shaped 5000 Series G-Shock cases — in both red and clear sapphire — these shock-resistant sapphire crystal watches were only concepts.

There’s no word on whether these concept watches will ever come to fruition, though, we hope they do materialize in the future.