What materials are watch crystals made of?

　　The watch crystal, which is the transparent lens on the front of the watch, is also known as watch glass and serves to protect the dial. However, some friends are still unfamiliar with the materials used for watch crystals. Would you like to know what watch crystal materials exist? Below, the editor introduces common watch glass materials for your reference.

　　Classification of watch glass materials

　　Sapphire crystal: Stable in physical and chemical properties, with a hardness second only to diamond. It solves problems such as scratching, ageing, and corrosion, but is fragile. (Generally used for high-end watches.)

　　Plexiglass: That is synthetic glass, commonly known as acrylic. It is prone to scratches, but has good toughness and is not easily broken. (Mostly used for entry-level watches.)

　　Mineral glass: Has better scratch resistance, but its resistance to vertical impact is stronger than that of sapphire crystal, which is why military watches mostly use it for watch crystals. (Used for mid-range and entry-level watches.)

　　Methods for identifying watch crystal materials

　　First, you can gently tap the crystal with your finger and listen carefully to the sound. Acrylic crystals produce a plastic-like sound, whereas glass produces a more solid sound.

　　Secondly, you can judge by weight: acrylic crystals are the lightest, while sapphire crystals are the heaviest. Because sapphire has excellent thermal conductivity, touching it gives a cool sensation. Furthermore, sapphire crystal is much smoother than the other two materials; if you place a drop of water on a sapphire crystal, the droplet will not spread easily, whereas on other materials it will disperse across the surface.

　　Jaeger-LeCoultre MASTER ULTRA THIN series Q1372520

　　Series:Master collection

　　Movement: Automatic mechanical movement

　　Strap: calfskin strap / American alligator leather (available to order upon payment)

　　Case: 18 rose gold-plated

　　Clasp: Folding clasp

　　Bezel: Standard

　　Crystal: Sapphire crystal glass

　　Diameter: 39MM

　　Water resistance: 30 metres

　　Review:Although the thickness of this watch may not astonish many, the Master Ultra Thin houses the Jaeger-LeCoultre 849 manual-winding movement, composed of just 123 components, with a movement thickness of only 1.85 mm. Meanwhile, its slender 38 mm diameter profile feels as though it can effortlessly be held in the palm of a hand.

　　[N Factory V8 Perfect Edition] Audemars Piguet Royal Oak Offshore Sports Watch 15703ST.OO.A002CA.01

　　N Factory Three Musketeers - A work of substance

　　Series:Royal Oak Offshore Series

　　Movement: Citizen 9015

　　Strap: Rubber strap

　　Case: Stainless steel

　　Clasp: pin buckle

　　Bezel: Standard

　　Crystal: Sapphire crystal glass

　　Diameter: 42MM

　　Water resistance: 100 metres

　　Review:A remarkably refined watch, featuring a 99% similarity to the genuine model. Compared to the previous version, the angles of the hexagonal screws on the front are more precise (as for the screws on the back, the genuine piece is also asymmetrical).

　　The printing and reflective effect of the date display are now more similar to the genuine article.

　　The dial and indices are identical to the genuine version, successfully recreating the beautiful, textured three-dimensional relief found on the original.

　　◆ The craftsmanship of the Royal Oak Offshore lettering on the case back has also been enhanced.

　　Conclusion:The above is a brief introduction to watch crystal materials. If you wish to purchase a replica watch, you are welcome to scan the QR code to follow us on WeChat.

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