Pearl Introduction

Pearl has many shortcomings. First of all, its hardness is too low, only about 3.5 Mohs hardness. It’s far below the glass. Therefore, it can easily be a hard object, such as iron, glass and other scratch, and also easy to wear shiny dust.
Diamonds, rubies, sapphires and so on, whose special nature is stability, in theory, even if they experience tens of thousands of years, they will not change. But the pearl, in contrary, the composition of it is an unstable mineral. It has automatically become a trend of mineral calcite. When the pearls of this internal change, the pearl will be yellow, while the loss of a beautiful pearl gloss, and the process is irreversible, resulting in the Chinese saying "when people is old, the pearl gets yellow". The matter cannot help. The jade and precious stones, which were through thousands of years, often intact to the present. But pearl was difficult to see the antiques. I am afraid that the rotation of the hydrocarbon into aragonite calcite-related damage is something with pearl.

The main mineral composition of aragonite pearls, whose chemical composition is calcium carbonate, is exactly the same with the construction of white marble stone, marble and so on. The chemical properties of calcium carbonate is very unstable, and it’s very easily soluble in acid. At the same time, it also should not be contact with cosmetics, oils and fats, alcohol gasoline, vinegar sauce, colored sweat color and the human body. Because they may be corrosion of the surface of pearl luster bad change, or infected with plaque staining stains pearls. Pearl necklace, bracelet, etc. due to frequent contacts the skin, when not wearing, should be used a neutral detergent to wash away the grease stain on it, with a net drift of water after dry storage.