You mean the jewelry?
925 means it’s 92.7% sterling silver
it is not g25, it is actually .925, as in .925 silver (92.5% pure silver).
They are the same thing, both names are used to identify the same piece of jewellery. A post earring is one that has a post that goes through the ear, usually secured with a butterfly, as opposed to a wire, which is generally longer and more flexible. A stud earring is an earring design that sits on the ear lobe as opposed to a drop type earring which hangs from the lobe, or a hoop earring that incorporates the fastening as part of the earring. So, to sum up, a post is one of the ways in which an earring is designed to go through the pierced hole of the ear lobe and a stud earring is a style of earring.
The part of the earring that goes through your ear is called "the post".
The 925 is indicative of 92.5% sterling silver.
That it is sterling silver but may be gold plated.
925 stamped into a piece is the symbol that proves that the piece is sterling silver. It is possible that what you are reading is actually 92.5 which would mean that the earring contains 92.5% gold, the rest being alloy.
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925 is the metal content for sterling silver. This means it is 92.5% pure sterling silver which is the standard.
925 means that it is sterling silver and cz means cubic zirconia (which means its they are not real diamonds).
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