There is a sapphire on my watch. What do you mean?

This watch is made of sapphire and the surface is sapphire glass, which has nothing to do with waterproof.

Among corundum gems, in addition to rubies, other colors of corundum gems are commonly known as sapphires, and the main component is alumina (Al? o？ )。 Blue sapphire is caused by a small amount of titanium (Ti) and iron (Fe) impurities. Sapphire can be pink, yellow, green, white, or even multiple colors in the same stone.

The existing watchcase materials include alloy, steel, ceramics, silica gel, enamel and so on. Enamel is a kind of powdered glassy material, which is made of raw materials such as timely, feldspar, borax, porcelain clay, etc., with metal oxide as colorant, through crushing and melting. Now it is usually called "enamel glaze". However, in ancient China, it was customary to call the glaze attached to the surface of pottery or porcelain tires, the glaze attached to architectural tiles and the enamel attached to the metal surface glaze.

Extended data

When designing a watch, some English will be printed on the dial, surface, back cover and other places to indicate the material category or brand logo. Some special displays in the dial, such as the abbreviation of the week, and some displays, such as the month and material category, will also use the corresponding English or English abbreviations.

The English on common watches is:

1, automatic, automatic mechanical watch. Automatic mechanical watch is an improvement and upgrade of ordinary mechanical watch, and a pendulum is added to the watch movement. When we put on an automatic mechanical watch, the pendulum will turn because of the swing of our arms. In the process of rotation, it can achieve the effect of winding, thus realizing the function of automatic winding.

2. On the dial of the watch, the relevant attributes of this watch will be printed in English. Regarding the material, the surface of many watches is sapphire glass, so the wearer will see the word "sapphire" on the dial.

Watches may also have diamonds, stainless steel body or strap, tungsten steel or 18K gold. Or the watch is automatic, timed, Swiss, made in Switzerland and waterproof.

Baidu encyclopedia-sapphire