Seven of the thirteen are pearl pieces, and they are what this page is really about — Dabney Pearl, which is the best-selling necklace in the shop, plus Delta, Aster Star, Birdie Moon, Corrie Clover, Willa Heart and Gracie Flower Pearl.

All synthetic. That is the point rather than a compromise: a real pearl of this size would be heavy, expensive and unhappy in saltwater. A synthetic one is light enough to forget about and survives the swim.

Alongside them: Marina Shell, an Anchor Charm, April Floating Opal White, Benny, and Gracie Flower and Dabney in colour.

• Material: 316L surgical-grade stainless steel, on all thirteen.
• Waterproof: all thirteen are rated for shower, pool, ocean and sweat.
• Price: $39. There is no other price on this page.
• Children's standard: ten of the thirteen are made to ASTM F2923-20.

Chain length is listed on each product page.

It means the metal does not corrode and the finish does not lift. 316L is the grade used for surgical instruments, chosen because it holds up in salt and sweat rather than because it sounds impressive.

What still helps: rinse with fresh water after the sea or a pool, and dry it before it goes back in a bag. It is the salt and chlorine residue left sitting on a chain that dulls a finish over a season, not the swim itself.

The earrings that match this are coastal flat back studs — forty-seven screw back studs in dolphins, starfish, palms and shells — and coastal hoops and huggies. For the bigger version of the same idea, coastal statement earrings.

If it is the pearls you are here for rather than the theme, pearl necklaces and pearl earrings gather them across every form. The full necklace range is waterproof necklaces, and everything built to be left on is hypoallergenic waterproof jewelry.

Further reading: why waterproof jewelry is the thing to pack.

Yes. All thirteen carry a waterproof rating for shower, chlorine pool, ocean and sweat. Rinse and dry afterwards and the finish lasts far longer.

No — synthetic, and deliberately. A real pearl at this scale would be heavy and would not enjoy saltwater or sunscreen. A synthetic one gives you the look at a weight you forget you are wearing, and it survives the holiday.

The finish is over 316L surgical-grade stainless steel rather than brass, so there is no base metal underneath waiting to oxidise. What wears a finish is friction and chemicals — sunscreen, perfume and abrasive polishing cloths do far more damage than the sea does.

Ten of the thirteen are made to ASTM F2923-20, the US children's jewelry standard, which limits lead and cadmium and restricts nickel release. The other three are not tested to it. The standard is stated on each product page.

Several do. Matching jewelry sets lists the pieces designed as pairs, where the earring and the necklace are the same design rather than merely the same colour.