Pearls are chemically composed of calcium carbonate, a substance that decomposes if attacked by acids, even weak ones (e.g. perfumes or sweat); avoid wearing them on the beach in the sun.
Conchiolin and water complete the chemical composition of pearls; in addition to corrosion due to acids, pearls run the risk of dehydration (do not expose them to heat). For this reason our certificates clearly specify that the measured weight and density refer to the date of the assessment and that they could consequently suffer variations over the course of time.
Pearls have a hardness that is significantly lower than quartz or diamond. For this reason they should not be worn or stored together with hard stones. They should be put away in a soft pouch or case, made of silk or cotton.
In the event that they have been accidentally stored inappropriately, then they should be washed with a cloth soaked in distilled water and allowed to dry. As a general rule you should restring your necklaces or bracelets at least once a year.
By taking the proper precautions, a pearl necklace, of good quality, will last for generations; the only price to pay will be the loss of luster and a colouring tending towards yellowish overtones.