Carly Cross is the one that sells — a CZ-set cross, in gold, silver and a pearl gold. It is the best-selling faith piece in the shop.

Catherine Cross, gold and silver — the larger, plainer shape.

Shepherd Cross, gold and silver.

And a plain Cross Charm for anyone who wants the symbol without a stone in it.

The other three are Heaven's 27, in clear, pink and purple CZ, at $42. It is an angel-number piece rather than a religious symbol — bought as a remembrance more often than as a statement of faith, which is a different purchase from a christening gift and worth knowing before you choose.

• Material: 316L surgical-grade stainless steel, on all eleven.
• Waterproof: all eleven are rated for shower, pool, ocean and sweat.
• Price: eight are $39; the three Heaven's 27 styles are $42.
• Children's standard: eight of the eleven are made to ASTM F2923-20.

Chain length is listed on each product page.

Two things decide whether a faith necklace gets worn after the occasion it was bought for.

The first is the metal. A plated brass chain worn every day by a child is a chain that turns a neck green inside a season. These are finished over surgical-grade steel, so there is no copper to oxidise.

The second is whether it has to come off. It does not — these are rated for the shower, the pool and a night's sleep, which for a child is the difference between a necklace that stays on and one that gets taken off at a swimming lesson and lost.

Eight of the eleven are additionally made to ASTM F2923-20, the US children's jewelry standard, if the recipient is a child.

The earrings that go with these are cross and faith flat back studs — eighteen styles including Clara Cross, Catherine, Latin, Micro and Millie, plus a Star of David, a Menorah and an Ichthys Fish, all on screw back posts at $32.

By finish: gold necklaces and silver necklaces. The full necklace range is waterproof necklaces, and if you want the earring and the necklace as a pair, matching jewelry sets.

Everything in the shop built to be left on is gathered in hypoallergenic waterproof jewelry.

It is what most of these are bought for. The thing that makes one a better gift than another is not the design but whether it survives being worn — these are steel rather than plated brass, and rated for water, so it can be worn from the day itself onwards rather than kept for occasions.

Yes. All eleven are waterproof and hypoallergenic, and eight of the eleven are made to ASTM F2923-20, the US children's jewelry standard, which limits lead and cadmium content and restricts nickel release.

An angel-number piece rather than a religious symbol. It comes in clear, pink and purple cubic zirconia at $42, and it is usually bought as a remembrance.

Every cross here except the Cross Charm and the Heaven's 27 styles comes in both. Neither is sterling or solid gold — both are finishes over the same 316L steel, so they wear the same way and cost the same.

Not the way sterling does. Sterling silver contains copper, which oxidises and needs polishing; it is also frequently alloyed with nickel, which is what most sensitive skin reacts to. Steel does neither.