1.[malachite and turquoise]

These two gems than the hardness of water, very easy to wear. Both chemically unstable, will be susceptible to corrosion in acid solution. Turquoise at high temperature, easy to change color, or even longer time of exposure and the sweat soaked, also can make turquoise color. These are in the process of wear and collection should pay attention to.

2. [pearls and corals]

Pearls and coral hardness is low, easy to lose luster due to friction and make the surface. Both elements are calcium carbonate, will suffer corrosion dissolved in acid. Summer is easy to sweat, sweat will make damage to the surface of the pearl, coral and lost its original luster. In cosmetics powder, perfume and hair cream, etc., can make pearls off gradually. So, summer had better not to wear this kind of jewelry. If the perspiration staining, can be put in clean water rinse, then wipe gently with soft fabric. Before pearl jewelry collection, be sure to pass water rinse, must also avoid cosmetics store.

3. [lapis]

Lapis necklace after staining, must not be soaked with water and rinse. Because lapis lazuli is granular aggregation of many kinds of mineral composition, if soaked with water and flushing, dirt on the surface of the stone to the internal penetration, so that will change the lapis lustre. Lapis lazuli jewelry tainted after, can use wet cloth to gently wipe, wipe the dirt.

4. [crystal necklace ]

Crystal necklace as a kind of ornaments, crystal transparent, dream, shiny material and conquered the hearts of women.

Classification:Amethyst necklace, black crystal necklace, crystal necklace, white crystal necklace.