| Price | by case |
| MOQ | 5PCS |
| Delivery Time | 4-6weeks |
| Brand | zmkj |
| Place of Origin | CHINA |
| Model Number | Pink color sapphire watch case |
| Packaging Details | standard plastic case |
| Payment Terms | T/T, Western Union |
| Supply Ability | 500pcs per month |
| Place of Origin | CHINA | surface | polished |
| Packaging Details | standard plastic case | Color | Pink/ Red |
| Material | Doped Al2O3 Sapphire crystal | Model Number | Pink color sapphire watch case |
| Hardness | 9.0 | Supply Ability | 500pcs per month |
| Brand Name | zmkj | Payment Terms | T/T, Western Union |
| character | wear-resisting | size | Can be customzied |
| Price | by case | Delivery Time | 4-6weeks |
| Minimum Order Quantity | 5PCS |
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.
| Diameter: | 30-50mm or customized |
| Thickness: | 3.75mm |
| N.W.: | 8.5g |
| Vickers hardness: | HV2000-2500 |
| Mohs hardness: | 9 mohs |
| High Crystal Purity: | > 99.995% |
| Compressive strength: | 21000kg /cm² |
| Crystal texture: | Hexagonal lattice structure |
| Specific heat: | (20~350ºC)0.181cal/g°C(25ºC) |
| Thermal conductivity: |
(20°C) 0.09calc.cm.ºC(25ºC) |
Sapphire Glass for watch case
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.
Unlike plastic or ordinary glass, sapphire glass does not yellow or degrade over time, maintaining its clear appearance for years.
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
Process
Step
Sapphire
body
Sapphire
rough
shape
Sapphire CNC
engraving
and
milling
-------> 
-------> 
Sapphire watch case's material
Our sapphire watch case material is crafted from high-purity single-crystal Al₂O₃, offering exceptional scratch resistance, optical clarity, and long-lasting durability. It is available in a wide range of vibrant colors—including clear, blue, pink, red, green, and white—achieved through uniform doping during crystal growth, not surface coating.
Each piece is 100% bubble-free, inclusion-free, and defect-free, ensuring flawless transparency and consistent light transmission. Advanced processing eliminates internal stress, making the material optically pure and structurally stable.
This sapphire material combines beauty and performance, with excellent resistance to scratches, UV light, and thermal stress. It is ideal for luxury mechanical watches, smartwatches, and sports models.
We support OEM customization in color, thickness, shape, and engraving. Choose our sapphire crystal for a premium, reliable, and visually stunning watch case solution.
Company information
Sapphire Watch case Q&A
A1: Sapphire glass has a Mohs hardness of 9, making it nearly as hard as diamond. It is extremely scratch-resistant, does not yellow over time, and offers excellent optical clarity, making it far more durable and premium than regular mineral glass or plastic.
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.
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.
