Sapphire Crystal vs. Mineral Glass, Why It's Not Just a Spec Sheet Line

Every Rifino uses sapphire crystal over the dial, and at this price point that's genuinely not the norm — a lot of watches in the $200-300 range use mineral glass instead, because it's a fraction of the cost.

The difference is hardness. Sapphire crystal sits at about 9 on the Mohs scale — only diamond is harder in anything you'll encounter day to day. Mineral glass is closer to 5-6. In practice: mineral glass will pick up fine scratches from keys, zippers, countertops, normal pocket and desk life, over months of wear. Sapphire shrugs almost all of that off. It's also more brittle under a direct hard impact, which is the one tradeoff — but for the scratches that actually accumulate on a watch you wear daily, sapphire wins by a wide margin.

It costs more to use, which is exactly why a lot of brands at this price skip it. I didn't want to build a watch that looked right in a photo and then picked up swirl marks in the first month of actual wear.

— Matt