Im sorry, but any girl who measures love based on the size of a jewelry is, :sigh: There are a variety of reasons for MILs buying small, lesser priced, or even artificial sets for their DILs to be. Now if you have a beef with your MIL on this before you are even married, then Im afraid you are sowing seeds of contempt before the marriage has even started.
This will lead you to measure the size of every thing she gives you. That will naturally lead to differences with your husband.
The worst thing a girl or a guy can do is compare their parents to their parents-in-law. The two can never be the same, so dont expect them to be. And besides, your perception of your parents vs your parents in law will never be the same either. Even if your parents did something that you hate your parents-in-law for, you would never even think of blaming your parents.
Maturity should be a pre-requisite to marriage! Forget age and all that.