The “Gram” ring, White Gold, Blue Sapphire

An organic jewel like living matter, designed to reproduce the near-perfect mathematical beauty of the Grammatophora diatom from which the model draws its inspiration. We call it "the Gram" because we've chosen to create extremely fine, precious pieces.

The pieces from the “Grams” collection are the representation of a jewel of the microscopic world: the Grammatophora, from the diatom family, marine microorganisms measuring a fraction of a millimeter producing with the rest of its species a quarter of the oxygen that we breathe on Earth and at the base of the food chain.

Because Diatoms are sublime and precious for life, little known and need to be protected, the Sœur & Mer dedicates its first collections to them and, thanks to you, is committed to an association invested in research to understand and predict the impact of climate change and pollution on the activity and evolution of marine microorganisms, but also to educate young people and mobilize political decision-makers.

Grams exist as a rings, bracelets, necklaces and earrings.

Regarding our Gram necklaces, you can "play" with an accumulation of grams of one row with different choices of stones, in 18-carat white gold or yellow gold.
You can contact us to buy the gram pendent without the chain, we will personalize your order.

As for earrings, you can mix earrings with different choices of stones, accumulate them on one ear if you have several piercings, and combine earrings of 1 row and that of 3 rows. You can also contact us to purchase only 1 gram earring instead of 2, we can personalize your order (the price will be divided by half)

As a gift for the women in your life, and this is also the spirit of Sœur & Mer, you can offer them a piece with a precious stone such as blue sapphire, and wear a piece with pink or yellow sapphire, or with tsavorites (a green gemstone like emerald, but less fragile).

Treat yourself, mothers, sisters, wives and enjoy yourself with the precious Grams !

The size of this ring is 54.

We offer you the possibility of adjusting the size of your jewel or having your jewel made to measure. This service is included in the purchase price.

It takes about 7 working days for your jewel to be cut to size, and longer for custom-made jewels.

Please do not hesitate to contact us if you would like to have your jewel cut, would like to tell us about your project.

Here's a guide to your finger size or that of your loved one.

Using a tape measure or other method, wrap a piece of paper around your finger and cut off the paper when you've gone all the way round, then measure the length of the paper on a flat surface.

Preferably do this at the end of the day, when it's neither too hot nor too cold. If you're between sizes, choose the larger of the two (the finger tends to thicken over time, and it's easier to resize a ring that's too big than the other way round).

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.

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.

Do you need additional information ?

You can write us a message with your contact details. We will get back to you as soon as we can.

The Grams pieces of jewelry have been designed for your everyday life.

To preserve these delicate handcrafted creations, made from noble materials in solid gold and precious stones, we recommend that you :

• Avoid contact with perfume or creams to preserve their color and brilliance.
• Remove them before going to sleep or when exposed to shocks, such as during sports or manual labor.
• Store your jewelry in its Sœur & Mer jewel case, which is designed to protect it individually from damage caused by contact with other jewelry.

To preserve the brilliance of your jewelry, we recommend that you clean it with lukewarm water, neutral ph soap and a very soft brush. You can also clean it with a chamois cloth.

We offer you the possibility of having your jewelry cleaned and polished in our Paris workshop.