A scratched or cracked watch crystal is one of the most common — and most visible — forms of watch damage. Whether it happened from a hard knock against a countertop or years of everyday wear, a compromised crystal affects more than just appearances. It can let moisture into the case, create sharp edges that catch on skin and clothing, and in the case of a crack, allow debris to reach the dial and movement beneath. Understanding what you’re dealing with — and what your options are — helps you decide how to handle it.
This guide covers the three types of watch crystal, what kinds of damage can be fixed versus what requires full replacement, what the service costs, and what to expect at Watch Technicians. For specific pricing and to book your repair, see our watch crystal repair services page.
The Three Types of Watch Crystal — and Why It Matters
Not all watch crystals behave the same way when damaged, and not all of them respond to the same repair methods. The material your crystal is made from determines what’s fixable versus what needs to be replaced outright.
Acrylic (Hesalite) Crystal
Acrylic, sometimes called Hesalite or plastic crystal, is the oldest and most affordable option. It’s lightweight, shatter-resistant, and — the key advantage — polishable. Light to moderate surface scratches on an acrylic crystal can almost always be buffed out completely, restoring clarity without replacement. The downside is that acrylic scratches easily in the first place, so if you’re seeing scratches on an otherwise well-maintained watch, acrylic is likely what you have. Acrylic is standard on vintage watches from the 1950s through the 1990s, and still used on budget-friendly contemporary pieces.
Mineral Glass Crystal
Mineral glass is hardened glass — more scratch-resistant than acrylic but less so than sapphire. It’s the most common crystal type on mid-range watches today: Citizen, Seiko, Fossil, Michael Kors, Bulova, and most branded fashion watches use mineral glass as standard. Light surface scratches on mineral glass can sometimes be improved with polishing, but mineral glass doesn’t respond as well as acrylic — deep scratches and cracks require full replacement. The good news is mineral glass crystals are relatively affordable to replace, and we stock a wide range of sizes and profiles for same-day turnaround on most common models.
Sapphire Crystal
Sapphire crystal is synthetic corundum — rated 9 on the Mohs hardness scale, second only to diamond. It’s standard on luxury watches and many mid-range pieces marketed on durability: Rolex, Omega, TAG Heuer, Seiko Presage, Citizen Signature, and most Swiss watches at the $500+ price point. Sapphire is highly scratch-resistant under normal conditions — if your sapphire crystal is scratched, it was hit with something seriously hard. The tradeoff is brittleness: sapphire doesn’t flex, so a sharp impact that would crack mineral glass may shatter sapphire instead. Sapphire cannot be polished — any visible damage requires replacement. We source OEM-specification sapphire replacements for Rolex, Omega, and most luxury and mid-range brands.
Can Your Crystal Be Polished, or Does It Need Replacing?
This is the first question we answer when you bring in a watch with crystal damage. The short version:
- Acrylic crystal with light to moderate scratches: Almost always polishable. A good polish removes surface scratches entirely and restores optical clarity. Deep gouges or cracks require replacement.
- Mineral glass with light surface scratches: Sometimes improvable with polishing, but results vary. Deep scratches and cracks require replacement.
- Sapphire crystal with any damage: Replacement only. Polishing does not work on sapphire.
- Any crystal with a crack: Replacement. A cracked crystal is a compromised seal — moisture, dust, and debris can enter the case and reach the movement. Don’t leave a cracked crystal unaddressed.
When you bring your watch in, we inspect the crystal type and damage depth before recommending anything. If a polish can genuinely restore the crystal, we’ll tell you. If replacement is the only real fix, we’ll tell you that too — along with the cost — before any work starts. Free estimates, no commitment required.
What Watch Crystal Repair Costs in St. Louis
Crystal repair pricing depends on the crystal type, the size and profile of the crystal, and whether polishing or replacement is required. The ranges below reflect typical service costs at Watch Technicians. For a complete breakdown of all watch repair pricing, see our watch repair cost guide.
- Acrylic crystal polish: Starting at $20–$35. Most acrylic polishes are completed same day.
- Mineral glass replacement: Starting at $40–$75 depending on size, profile (flat vs. domed), and model. Most standard sizes completed same day or next day.
- Sapphire crystal replacement: Starting at $75–$150+ depending on the watch model and crystal specification. Some specialty or custom-profile sapphires require ordering, which adds 3–7 days.
- Sapphire replacement on luxury watches (Rolex, Omega, TAG Heuer): $150–$300+ depending on model and whether the crystal is coated (anti-reflective coating on Rolex Cyclops and most Omega crystals adds cost). We source OEM-spec replacements only — no third-party generic crystals on luxury watches.
If your watch took a hard enough impact to crack the crystal, it’s worth having the movement inspected at the same time. Shock can displace components inside the movement even when there’s no visible damage. We check this as part of our free estimate.
Crystal Damage and Water Resistance
Any crack in a watch crystal breaks the water resistance seal. Even a hairline crack that’s barely visible lets water in under pressure — the kind of pressure your watch experiences when you wash your hands or get caught in rain. If your watch is rated for water resistance and the crystal is damaged, treat it as no longer water resistant until the crystal is replaced and the watch is pressure-tested.
After crystal replacement on water-resistant watches, we perform a pressure test to confirm the seal is restored before returning the watch. This is standard procedure — not an add-on. We also replace the case back gasket during crystal service on any watch rated at 50 meters or more, since the case has been opened during the repair.
Brands and Models We Service Most Often
Crystal repair and replacement is one of the most universal services we provide — every brand, every price point. The watches we see most frequently for crystal work include Seiko (mineral glass on most, sapphire on Presage and higher tiers), Citizen (mineral and sapphire depending on collection), Bulova, Fossil, Casio, TAG Heuer, Omega Seamaster and Speedmaster, Rolex across all references, Hamilton, Tissot, and the full range of fashion watch brands including Michael Kors, Skagen, and Michele. If your watch has a crystal, we can service it.
For vintage watches — pieces from the 1960s through 1990s that use either acrylic or early mineral glass — crystal sourcing is more involved. We stock a wide range of vintage crystal profiles and sizes, and can source custom-cut acrylic crystals for watches where standard sizes don’t match. Vintage crystal work takes a bit more time but is very much worth doing on pieces with sentimental or collector value. See our watch repair services in St. Louis for the full scope of what we handle.
Three Walk-In Locations — No Appointment Needed
Bring your watch to any of our three St. Louis locations for a free inspection and estimate. For most mineral glass and acrylic crystal repairs, same-day turnaround is available.
- Creve Coeur (Flagship): 11483 Olive Blvd | Mon–Sat 9am–5pm | (314) 513-8455
- Des Peres: West County Mall (West County Center) | Mon–Thu 11am–7pm, Fri–Sat 10am–7pm, Sun 11am–6pm
- Chesterfield: Inside Dierbergs Chesterfield | Mon–Sat 10am–5pm
Frequently Asked Questions About Watch Crystal Repair
Can a scratched watch crystal be fixed without replacing it?
It depends on the crystal type and how deep the scratch is. Acrylic (plastic) crystals can almost always be polished to remove light and moderate scratches. Mineral glass can sometimes be improved with polishing, but deep scratches require replacement. Sapphire crystal cannot be polished — any damage on sapphire requires replacement. Bring your watch in for a free inspection and we’ll tell you which applies to yours.
How long does watch crystal replacement take?
Most mineral glass and acrylic crystal replacements are completed the same day, often within a few hours. Sapphire replacements on common models are also frequently same-day if we have the crystal in stock. Specialty sapphires for certain luxury models or unusual crystal profiles may need to be ordered, adding 3–7 business days. We’ll confirm turnaround time when you bring the watch in.
Is my watch still water resistant after crystal replacement?
After crystal replacement on any watch rated for water resistance, we perform a pressure test to confirm the seal is restored. We also replace the case back gasket during the service on water-resistant models. We do not return a water-resistant watch without confirming it passes the pressure test first.
How much does watch crystal replacement cost in St. Louis?
Acrylic crystal polishing starts at $20–$35. Mineral glass replacement starts at $40–$75 depending on size and model. Sapphire crystal replacement starts at $75 and goes up to $150–$300+ on luxury watches depending on the model and crystal specification. Stop in for a free estimate — we’ll inspect the crystal and give you an exact price before any work begins.
What if my watch crystal is cracked — does that affect the movement?
A cracked crystal breaks the water resistance seal and can allow moisture and debris into the case. If the impact was significant, there may also be internal movement damage from the shock. We inspect the movement as part of the free estimate on any watch brought in with crystal damage, so you’ll know if there’s anything else to address before it becomes a bigger problem.
Do you replace sapphire crystals on Rolex and Omega watches?
Yes. We source OEM-specification sapphire crystals for Rolex, Omega, TAG Heuer, and other luxury brands — including models with anti-reflective coating, Cyclops date magnifiers, and custom profiles. We don’t use generic third-party crystals on luxury watches. Bring your watch in and we’ll confirm availability and pricing for your specific reference.