What does it mean in the ring description when it says 'it gets dented/pitted by handbag chains'?

This phrase is not attached to just one product. The same content is repeated for the Baby Heart Cubic Ring and the Bold Dome Ring^[1][2]. The two rings share one thing in common: they are made of silver and have a wide surface.

The materials of the Baby Heart Cubic Ring are 925 silver (925 silver) and CZ (cubic zirconia)^[3]. Silver is relatively soft among metals, and 925 silver is made by mixing other metals with pure silver to increase its strength. Even so, because it is softer than steel-based metals used in bag chains or keyrings, if it bumps into something narrow and hard, that spot gets pressed and pitted like a dot. Furthermore, as the surface is wider and flatter, light is reflected more evenly, so even a single tiny indentation is revealed as a shadow. This is why the same impact, which would not be very noticeable on a thin band ring, catches the eye on a wide surface.

That is why storage instructions are provided together. It says to wipe it with a clean, soft cloth and then store it sealed^[4]. Sealing is generally a method to slow down silver turning black from reacting with sulfur components in the air, and at the same time, it eliminates the chance of bumping into other metals inside a bag or drawer.

hmmm, the design that highlights a wide surface as it is and the property of marks remaining on that surface ultimately arise from the very same condition.