What time is it? Watches and horology

^ which is why I'll never wear a watch that doesn't have a sapphire crystal.

Question: Are there any watches whose glass is fused quartz?

Fused quartz is an awesome material, incredibly strong, scratch resistant, optically purer.

It is more resistant than even sapphire glass to thermal shocks, impact, and more than equally resistant to sapphire for scratch resistance.

It's used on things like the windscreens of supersonic and hypersonic aircraft (i.e. the blackbird, the X-15, the Virgin Galactic) as well as the glass on spacecraft. It's also used for lenses, lasers, scientific equipment.

Is it just the cost that prevents it being used on watches? I would've thought this would make it the perfect bling spec.

The only downside is that depending on the method of fusing, a degree of solarisation can eventually emerge in the glass itself. But this can be avoided (but if not, then like the tropical Rolex watches I'm sure people would love it).