What are lab-diamond studs in a martini, basket or screw setting, and which is secure?

A martini setting uses three or four prongs in a cone shape, a basket setting uses a wider open frame for more light, and a screw setting refers to the back that screws on. They are a mixture of head style and fastening, so choose both with care.

Martini setting

Our advice A cone-shaped head with three or four prongs. It is compact, lets light in and sits close to the ear. It suits small to medium stones.

Basket setting

• A wider frame of prongs with a crossing wire
• Lets in light from the side
• Holds a larger stone and shows more of it
• May catch more on hair and clothing

Screw back

Our advice A threaded post and back that screws on, rather than a friction butterfly. It is more secure and is available with either head style.

Comparison

• Look. Martini: Neat and compact; Basket: More open.
• Light. Martini: Good; Basket: Very good.
• Snagging. Martini: Low; Basket: Higher.
• Best for. Martini: Small stones; Basket: Larger stones.

Choosing

1. Match the head to the stone size.
2. Choose a screw back for security.
3. Check that the prongs are even and smooth.

Fact GIA's care guide says a diamond that is loose in its setting can wear through a prong over time.

Our advice Have prongs and settings checked by a jeweller regularly, a good habit for studs that are worn daily.

It depends Choose according to the look you like. A martini setting is neat, while a basket maximises the stone's exposure.

Care

• Rinse and dry gently
• Check the back threads

What to ask the seller

• How many prongs does the setting have?
• Is the back a screw back or a push back, and are spares available?
• What is the metal of the post, and how thick is it?
• Do the studs come with a repair policy if a prong bends?

Uncertain We cannot say which setting will perform better for you. Choose a reputable seller and check the prongs.

Related reading: What should I do if a stone looks loose in its setting? · Cleaning Lab Diamond Earrings Without Damaging the Setting

Sources

• GIA, Diamond care and cleaning

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