Red Single Sapphire Crystal Glass , Custom Sapphire Watch Crystal Transparent

Sapphire Glass

Sapphire optical windows are ideal for applications where high pressure, vacuum, or corrosive atmospheres are a consideration. Sapphire, a single crystal form of Al2O3, is resistant to attack by strong acids due to its high dielectric constant. It has high compressive strength and a high melting point. It is also resistant to UV radiation darkening. Our sapphire optical windows are not coated, but a single layer coating of MgF2 on each surface of the window increases the single surface transmittance to 99% throughout the entire visible spectral region. Please note the SAW series sapphire windows are provided in random axis orientation by default and its birefringent nature could affect the polarization state of your application.

Sapphire Glass for watch case

1. Ultimate Scratch Resistance

With a Mohs hardness of 9, sapphire is second only to diamond. It resists scratches from keys, sand, and other daily objects, keeping the watch surface pristine over time.

2. Crystal-Clear Transparency

Sapphire offers exceptional optical clarity, ensuring the watch dial remains highly visible and easy to read from all angles, enhancing both aesthetics and user experience.

3. Luxurious Appearance

Featuring a smooth, glossy surface and gemstone-like brilliance, sapphire glass adds a premium, sophisticated touch — a preferred material for luxury timepieces.

4. Anti-Aging & UV Resistance

Unlike plastic or ordinary glass, sapphire glass does not yellow or degrade over time, maintaining its clear appearance for years.

5. High Durability for Daily Wear

Sapphire is highly resistant to pressure and impact, making it ideal for everyday use, travel, and sports — minimizing the risk of cracking or breaking.

6. Customizable for Unique Designs

Available in various colors (blue, pink, green, etc.), thicknesses, and surface styles (flat, domed, coated), sapphire glass can be tailored to meet diverse brand design requirements.

Sapphire watch case

Q2: Are your sapphire watch cases really made from 100% sapphire crystal?

A2: Yes. Our sapphire watch cases are made from high-purity, single-crystal Al₂O₃ (aluminum oxide), grown through a precision crystal growth process. Each unit is free of bubbles, inclusions, and surface flaws, ensuring both visual beauty and mechanical strength.

Q4: What sizes and shapes are available for the sapphire glass?

A4: Standard diameters range from 30–50 mm with a thickness of around 3.75 mm. However, we support OEM customization, including shape (flat/domed), edge profile, color, and even engraved designs based on your technical drawings.