Ask them to see if they can research and get a few feelers of what your partner wants or better yet, ask one of them who you’re comfortable with to come do the shopping with you. It’s always good to have a second opinion if you’re unsure.
This is often something that is not considered until it comes down to finalising the ring design and can be a confusing choice, but to make it easier, all you need to know is what colour or type of metal your partner wears daily. Is their jewellery usually in yellow gold? Have they ever mentioned that they would like a rose gold band for a change? We always recommend setting diamonds in a durable non-tarnishing precious metal such as 18K gold (yellow, white or rose — white being the most classic option) or platinum.
Both white gold and platinum take on a similar looking colour in their final appearances — bright white. However, white gold derives its colour from rhodium, which is a lustrous durable bright white precious metal used for plating.
See also: Our Comprehensive Guide to Diamond Engagement Rings
In its raw form, white gold is typically alloyed with silver, nickel or palladium. The resulting colour of the metal is a dullish gray with a tinge of yellow. Hence, there is a need for plating it with rhodium to give it that brilliant white look.
On the other hand, platinum being naturally white doesn’t require any plating. With regular wear, the metal’s sheen can fade slightly and it takes on a dull characteristic patina which many wearers get comfortable with. If you aren't comfortable with this dull worn look, we advise to bring the piece of jewellery back for occasional polishing and buffing to maintain and bring out its luster.