Acrylic Vs. Sapphire Watch Crystal - A Detailed Comparison

Introduction

The watch industry has gone too far, offering a variety of watch choices ranging from simple to the luxury category. The components used in these watches also vary in parallel with their respective categories. Simple watches usually feature average-standard components, whereas luxury watches use premium-quality components. Among these watch parts, “watch crystal” is a notable and commonly discussed component in the watch community. It is known to be the protective glass and front face of every watch. The watch crystals feature different types, including acrylic, mineral, and sapphire, depending on the watch’s standard.

In today’s guide, we will conduct a detailed comparison between acrylic and sapphire watch crystals. We will discuss their core features, market-standard, and other relevant aspects. Let’s start the discussion.

Watch Crystal

What is a Watch Crystal?

What you find on the front face of every watch is actually a “watch crystal”. In simple terms, a transparent material covering/protecting a watch dial is known as the watch crystal. Even some modern watches feature the same crystal on the backside of the watch.

The word “crystal” does not directly relate to the crystal material itself; the watch crystal is composed of multiple materials, resulting in various types. The highlighted types include acrylic, mineral, and sapphire. Below are the features of a watch crystal.

Core Features

  • Watch crystal offers clean, neat, and transparent material.
  • Watch crystal resists water, dust, scratches, and dulness.
  • Watch crystal features durability against pressure impact and cracks.
  • Watch crystal offers ease of replacement (with professional tools).
  • Watch crystal offers UV protection and antireflection features for a clear view.

Acrylic Watch Crystal

You know what? Acrylic crystal is the most commonly used watch crystal in the market. It is manufactured using polymethyl methacrylate (a type of plastic material known as PMMA). The acrylic crystal feels like plastic, is lightweight, and budget-friendly. You will mostly find this type of watch crystal in watches like retro, vintage, and other related ones. The other known names for this watch crystal are Plexiglass and Hesalite crystal.

Pros

  • Impact Resistant (No Cracking)
  • Light Weight
  • Can be Polished Easily (Using Watch Polishing Kit)
  • Budget-Freindly

Cons

  • Prone to Scratches
  • Can become Dull or Yellowish
  • Not Heat Resistant
Sapphire Watch Crystal

Sapphire Watch Crystal

A type of watch crystal manufactured with synthetic sapphire. It is considered to be a premium quality watch glass that is designed, manufactured, and tested under the supervision of lab experts. It features a crystal-clear view, is resistant to scratches, water, and dullness. Sapphire watch crystal is mainly used in luxury category watches and features long-lasting performance without any compromise.

Pros

  • Premium Quality
  • Luxury Category
  • Durable/Long-Lasting
  • Scratch Resistant
  • Heat Resistant
  • Clean & Clear View

Cons

  • Can’t bear High Impact
  • Expensive Compared to Acrylic
  • Hard to Repair
  • More Weighty than Acrylic

Acrylic Vs. Sapphire Watch Crystal

1: Material Comparison

  • Acrylic Crystal: This crystal is made of flexible and impact-free plastic (polymethyl methacrylate).
  • Sapphire Crystal: This crystal is made of lab-tested sapphire (aluminum oxide). It is the second hardest material after diamond.
  • Result: In terms of material quality comparison, Sapphire Watch Crystal takes the lead because of its premium material and hardness.
Watch Crystal Scratch Resistance

2: Scratch Resistance

  • Acrylic Crystal: Scratches can appear easily on this crystal. It performs weakly against dulness, scratches, and dust. These scratches can be removed by polishing.
  • Sapphire Crystal: Mohs hardness of 9 out of 10 makes sapphire crystal highly scratch-resistant. Similarly, it never becomes yellowish or dull.
  • Result: The clear winner in scratch resistance comparison is Sapphire Crystal with extraordinary features.

3: Impact Resistance

  • Acrylic Crystal: This crystal features a certain level of flexibility and softness in its nature. So it works efficiently against the pressure impact (shattering).
  • Sapphire Crystal: This watch crystal features hardness in its nature. So it is prone to pressure impacts that can result in cracking or shattering.
  • Result: The Acrylic Watch Crystal proves to be a better option when it comes to impact resistance.

4: Durability/Lifespan

  • Acrylic Crystal: This crystal type proves to be durable when it comes to impact resistance; the rest of the other features are up to or below the average standard.
  • Sapphire Crystal: From day one to many years, the sapphire watch crystal remains durable and reliable, showing no loss in performance parameters.
  • Result: The credit for better durability and lifespan undoubtedly goes to Sapphire Watch Crystal.

5: Clarity Comparison

  • Acrylic Crystal: This watch crystal offers better clarity, but for a short span of time. Regular wearing can result in dullness and a yellowish shade.
  • Sapphire Crystal: Even after decades, the sapphire watch crystal features a neat and clean appearance like a brand-new watch crystal. 
  • Result: Again, the ball is in the court of Sapphire Watch Crystal, if we thoroughly compare the clarity of both.

6: Weight Comparison

  • Acrylic Crystal: This watch crystal features comparatively less weight, along with softness and flexibility.
  • Sapphire Crystal: This watch crystal is heavier and feels solid because of the high-end material used in manufacturing.
  • Result: In terms of weight, the Acrylic Watch Crystal is lighter (apart from the question of whether it is good or bad).
Polishing the Crystal

7: Maintenance

  • Acrylic Crystal: Maintenance of this watch crystal is easy, pretty easy, and budget-friendly too. Usually, it can be easily polished at home.
  • Sapphire Crystal: Maintenance cycle plus maintenance cost for sapphire watch crystal is found to be expensive. However, it rarely gets scratches or damage.
  • Result: We can consider a tie here, because the Sapphire Crystal rarely needs maintenance. While the Acrylic Crystal needs regular maintenance. The cost becomes equal.

8: Aestheticness Comparison

  • Acrylic Crystal: A Vintage look can be achieved with an acrylic watch crystal, which is commonly used and found in retro or collector watches.
  • Sapphire Crystal: A luxurious, clean, and neat look, as well as a modern standard, are the well-known attributes of sapphire crystal in terms of aesthetic appeal.
  • Result: Sapphire Watch Crystal is the clear winner when comparing the aestheticness of both crystals.

9: Cost Comparison

  • Acrylic Crystal: This crystal is affordable for all and is used mostly in vintage watches.
  • Sapphire Crystal: This crystal is expensive and used in high-end luxury watches.
  • Result: The Acrylic Watch Crystal is more affordable here.
Acrylic vs Sapphire Crystal

Which is Found to be Better?

Choose Acrylic Crystal When:

  • When the wearer prefers a classic look.
  • When the wearer has a tight budget.
  • When the wearer prefers impact resistance.
  • When the wearer prefers comfort and lightweight.

Choose Sapphire Crystal if:

  • When the wearer prefers a luxurious watch look.
  • When the wearer prefers a scratch-resistant watch crystal.
  • When the wearer prefers durability and long-lastingness.
  • When the wearer prefers crystal clear transparency.

Watches Using Acrylic and Sapphire Crystals

Watches Using Acrylic Crystals

  • Omega Speedmaster Professional
  • Swatch Originals
  • Casio F91W
  • Timex Marlin
  • Hamilton Khaki Field Mechanical
Best Watch Crystals

Watches Using Sapphire Crystals

  • Rolex Submariner
  • Omega Seamaster Diver 300M
  • TAG Heuer Carrera
  • Tissot PRX Powermatic 80
  • Longines HydroConquest

Concluding Remarks

This comparison guide concluded that both watch crystals (Acrylic vs. Sapphire) fulfill the requirements of users in their respective domains. They just differ in the belonging categories, where acrylic crystal suits the requirements of vintage and classic watches. Similarly, the sapphire crystal meets the requirements of luxury and modern standards. Moreover, the acrylic watch crystal excels in terms of impact resistance and lightweight preference. However, the sapphire watch crystal features extraordinary performance against scratches and serves for a longer period of time (even decades).

If you are a watch enthusiast, DIY enthusiast, collector, or professional watch expert, Soflypart is a renowned platform offering a variety of watch-related items, equipment, and accessories. Additionally, we provide premium-quality watch repair tools, watch movements, and other specialized watch parts.