How to maintain jewelry pieces containing pearls or hard stones ?

It is strongly discouraged to swim or have contact with water or liquids with jewelry pieces containing pearls or hard stones (malachite, lapis lazuli, onyx, agathe, nacre, corail, turquoise,…).
Please avoid as well any contact with perfume, cosmetics and/or chemicals.
Any jewelry piece is unique and hand made. It can therefore presents irregularities.