Clara Cross is the one that sells — 253 pairs of the gold sparkle in the last twelve months, which makes it the tenth best-selling product in the shop, and it also comes in silver sparkle, pearl and abalone shell. Catherine Cross is the largest at 10mm, in gold and silver, and did 133 pairs. Latin Cross, Micro Cross and Millie Cross each come in both metals, the micro down at 4mm. Thirteen of the eighteen are gold-toned, five silver-toned.

The Star of David and the Menorah are here for the same reason — a bat mitzvah gift wants a stud a child can sleep in, not a hoop. Heaven's 27 comes in clear, pink and purple CZ at $36, an angel-number piece rather than a symbol, and the Ichthys Fish rounds it out. Fourteen styles are $32 and four are $36.

Also worth seeing — 55 silver flat back studs if the gift is silver, or the full screw back flat back stud collection. For everything else made the same way, earrings and necklaces both, see hypoallergenic waterproof jewelry.

Yes. All of them are made to ASTM F2923-20, the US children's jewelry standard, and thirteen are sold as children's styles. The back screws on rather than pushing on, so it does not come out at school.

316L surgical-grade stainless steel, 20G (0.8mm), 7mm long — the same on all of them. It is a flat back, so nothing digs in when a child sleeps on it.

Mostly, but not only. Twelve of the eighteen are crosses; the Star of David and the Menorah are Jewish pieces, Heaven's 27 is an angel-number CZ style, and the Ichthys Fish is an early Christian symbol.

All of them are rated waterproof — shower, pool, ocean and sweat. That is the argument for 316L steel over plated brass on a gift meant to outlast the ceremony.