How thin can prongs, bezels and shanks be in 925 silver?

ZKZ Editorial TeamMain answer · Product & gemmology desk

There is no single figure that applies to all designs. The safe thickness depends on the shape, the stone, how the piece is used and how it is made. Ask your factory for its minimums, then test a sample under realistic wear.

What affects thickness

Our advice Silver is softer than some other jewelry metals, so very thin parts can bend or wear. Prongs, bezels and shanks are exactly the parts that take stress.

• Prongs: hold the stone and need enough metal to grip it
• Bezels: thin rims can be pushed or nicked
• Shanks: thin shanks can flex, distort and wear through

Design choices that help

1. Make the shank thicker at the bottom, where it wears most.
2. Use enough prongs for the stone size.
3. Add a little extra metal at stress points.
4. Round the edges rather than leaving sharp ridges.

Fact Jewelers Mutual say that worn prongs are a common reason a stone can become loose.

Our advice This is why checking prongs regularly matters.

It depends A delicate look is a design choice with a durability cost. Choose it knowingly, and tell customers how to care for the piece.

Test it

Our advice Wear a sample for several weeks or ask a factory or lab to run a durability test. Compare against a slightly thicker version.

Agree a minimum

• Write minimum thicknesses into the specification
• Check samples against them

What to tell the customer

Our advice Be honest on the product page about delicate designs. Mention that a slender setting looks refined but needs gentle wear and a periodic check. Customers who understand this are less likely to be disappointed, and they are more likely to return for servicing, which is better for both their jewelry and your reputation.

Our advice Ask the factory for the actual thicknesses it uses and compare them with a sample you have handled. Thin parts look elegant but need more careful wear, so match the design to how the customer will use it.

Uncertain We cannot give a safe minimum thickness. It depends on the design and must be tested.

Related reading: What is Argentium or tarnish-resistant silver, and how does it compare with 925? · 925 Sterling Silver vs Sterling Silver: Is There a Difference?

Sources

• Jewelers Mutual, What to do if you need a ring repair

Fact = stated by the cited source. Our advice = editorial recommendation. Uncertain / it depends = limits of what can be said in general.