Jewellery and Rings

Q: Are women allowed to wear:

1. Imitation rings?

2. Other imitation jewellery besides rings?

Q: Is it permissible for men and women to wear sterling silver rings? If not permissible what is the reason?

Q: Are men allowed to wear platinum rings?

Q: Is the wearing of a ring all the time a sunnah since we wear it as jewellery (as adornment)? Did Rasulullah (sallallahu alayhi wasallam) wear it for the same reason or because he needed it to stamp his letters? If it is permissible as a sunnah to wear it all the time, please advise which finger and which hand should one wear the ring? Similarly, how many rings can a male and female wear?  

Q: Please advise on the permissibly of a man wearing an Argentium Sterling Silver ring. Argentium Sterling Silver contains 92.5% of Pure Silver and 7.5% Copper. The Copper is used to strengthen the silver (an alloy).  The weight of the entire ring does not exceed more than 4.374 grams.

Q: What is the criteria a ring has to meet in order for it to be permissible for a man to wear?

Q: Is it permissible for women to wear imitation rings?

Q: Is it permissible for woman to wear rhodium plated rings?

Q: I am of the understanding that piercing of the ears for woman is permissible. However is it permissible to have more than one piercing on the ear? Also is it permissible for piercing of the navel for woman?

Q: Is it allowed to pierce bellybutton if my husband wants me to?