You have bangle with dltd micron 9ct rg pat1167637 on it what does that mean?

Normally the label makes it clear if jewellery is not solid gold, only plated with gold.

Some plated jewellery will last for many years. See if the thickness is described in microns. Under average use you will wear away 1 micron every 2 years, so 10 microns should last 20 years. Rings suffer above average wear, while ear-rings last longer.

Take special note of these terms.

Rolled gold: originally a sheet of brass was placed between 2 sheets of gold, and they were rolled out until they merged, nowadays the term normally refers to electo-plated gold, often of good quality, but do check what the label says.

9ct back and front: a term which is no longer legal, but is sometimes seen on old jewellery. It means the item is plated