Vermeil pronounced 'Ver-may' is when a minimum of 2.5 microns of gold plating is applied over Sterling Silver. In order to be considered Vermeil, sterling silver must be the base metal used.
To care for Vermeil it's best to keep it clear of any perfumes and oils. Salt water and chlorine may also damage it over time, so be mindful to remove jewelry before swimming. If dirty clean with warm soapy water, and use a soft non abrasive polishing or microfiber cloth.
Gold-filled jewelry refers to the process of bonding a standardized amount of gold over a base metal, usually brass. The gold is bonded to the base metal at a specific thickness to ensure that it comprises at least 5% of the item's total weight.
Treat gold-filled jewelry the same as Vermeil, don't use anything abrasive to clean it. Use warm soapy water and a soft non-abrasive microcloth to clean. To extend the life of your pieces, place them inside an airtight bag for any long-term storage.
Sterling silver is a very durable material that comprises of .925% silver.
When not in use Silver will oxidize and tarnish, so it's best to keep it in an airtight bag for storage or to clean frequently with a soft non-abrasive polishing cloth.