“Petroneis” necklace, solid silver

Like the rest of the collection, this piece represents the plankton, the natural jewel of the microscopic world in the Ocean. More specifically among the plankton, diatoms are single-celled brown microalgae that make up most of the phytoplankton and produce a quarter of the Earth oxygen. The particularity of diatoms is to have a membrane surrounded by a transparent siliceous shell, sensitive to pollution.

Because Diatoms are magnificent and precious for life, they need to be protected: that is why our brand Sœur & Mer dedicated its first collection to them in order to raise awareness as they are unknown to most people.

Thanks to you, through your acquisition of one of our pieces of jewelry, our brand is able to make a 5% donation to the Tara Ocean Foundation, developing an innovative and original open ocean science which, in the future, will enable us to predict, anticipate, better understand climate risks and better protect biodiversity.

Many of you choose to gift Sœur & Mer jewelry to the dear women in your life : your daughter, mother, sister, or soul mate.

At Sœur & Mer, we take great care to make this moment truly magical.

Let us know if it's a gift and if you would like to include a personalized note. By default, a handwritten note signed by the Maison's Foundation accompanies each piece of jewelry. This note explains what the jewelry piece represents, its collection, the manufacturing process in our Parisian workshops, and our commitment to the Tara Ocean Foundation to support research aimed at protecting the environment and biodiversity.

The jewelry box is a delicate turquoise color and is also made in France. The jewelry is carefully protected by tissue paper, and a satin organza ribbon adds the perfect finishing touch to the packaging.
Additionally, a personalized Sœur & Mer pouch is included to store the jewelry piece daily.

In order to reduce waste, Sœur & Mer avoids stocks : we manufacture products on demand once orders are confirmed, within three weeks in most cases.

Our domestic and international parcel service is Colissimo, a fast-track service which provides deliveries at home from Monday to Saturday, excluding public holidays. The delivery is to be made to the address our customers indicate while placing their order. See more details.

The best way to preserve your piece of jewelry is to give it the proper care.

Your piece of jewelry is jewel is the result of craftsmanship and is to be handled with delicate care. All our pieces are made
of noble materials in solid silver or silver plated with 24-carat gold.

We recommend that you:

• never wear it during activities that could damage it, such as sports, aquatic or manual activity
• also never take a shower, bath or steam while wearing it.
• do not expose it to strong heat or strong temperature variations, corrosive products or perfumes.
• store your piece of jewelry in its Sœur & Mer pouch provided in a fabric allowing the jewel to access air and also store it individually so that it does not get scratched by being in contact with other jewels.

If your piece of jewelry has oxidized, a “home-made recipe” might do more harm than good: take it to a professional who can restore it by for example resilvering it or replating the silver with gold.