Submersion watches are not only needed in such relaxing activities as diving in the sea, or playing around the beach, but also borne with hopes to guarantee our nobility and esteem on some important occasions. A submersion watch seems the best word to express your own fashion for the open and blue sea if we have a vision that it can bring us a sense of fashion life.

Some famous submersion watch brands, such as Diverscope Jean Richard, Master Compressor Diving Pro and Omega, are all making their efforts to create the best submersion watch.

As people are increasingly focusing on submersion watch, I believe it is necessary for us to be prepared with some basic knowledge of submersion watch.

As its name suggests, submersion watch serves as timing during the diving. A submersion watch has been through waterproof treatment, dampproof treatment as well as used as a special tool for the divers. In general, a waterproof watch can not be seen as a submersion watch.

A submersion watch must follow a series of strict regulations. Not every watch which does well in waterproof can be seen as a submersion watch. To put it simply, a submersion watch must equipped with a high drainability and luminous needles and scales which can be read under the dark sea.

In general, most submersion watches bear features as follows:

1. The waterproof capability of a submersion watch can keep functional even at least 200 meters below the sea surface.

2. The rotary outer ring for measuring diving time must be designed to prevent

contrary rotation.

3. As divers tend to be located in the dark and deep sea, the surface, needles and scales must be painted with fluorescent materials to offer easy read.

4. A watch modeled after a submersion watch in design can not endure the trial of deep sea. Strictly, only a watch that conforms to the specifications, criteria and tests under the rule of International Organization for Standardization can be called a qualified submersion watch.

A diamond is classified according to the 4C evaluation criteria, including coulour, clarity, cut and carat. And it plays a very important role in determining the quality of a diamond.

Coulour

The coulour is an essential element affecting the value of a diamond. If the coulour is close to colorless and purity, it means the diamond is very precious. While many diamonds appear colorless according to the judgment of naked eyes, in fact, they are kind of yellow or brown. If the coulour of a diamond is a little heavier, the price of the diamond will greatly fall down.

Clarity

Because diamonds are natural minerals, there may be inclusions or cracks in them. And the natural characteristics will affect the condition of natural light through the diamonds, thus affecting the appearance of diamonds. Therefore, the fewer inclusions there are in a diamond, the higher the clarity is and the more light refraction there is. Naturally, the value will be higher.

Cut

The cut can strengthen the diamond’s characteristic of reflecting light and completely show out the bright light of a diamond. When it refers to diamonds, most people will directly think of round diamonds. In fact, most of the world’s famous diamonds belong to the fancy cut, such as heart-shaped ones and pear-shaped ones.

Carat

The weight of a diamond is generally measured by carat. One carat is divited into 100 points. And the diamond that weights more than 1 carat is generally measured by carat; on the contrary, it is measured by point. The abbreviation of carat is “ct”. Carat originated in India. People there found that the weight of the seeds of a tree producing beans was very stable, each weighting approximately 0.197 grams. Then people used this as the standard of carat.

According to the 4C evaluation criteria, it is not difficult to determine the value of a diamond. Therefore, when you get a diamond next time, check the value of it according to the criteria, seeing if it meets the fact.