Jewellery and Rings

Q: Is it permissible for women to wear silver imitation, sterling silver, gold plated and stainless steal rings?

Q: Is wearing rings on the middle finger impermissible or makrooh?

Q: Is it true that it is sunnah for a woman to wear some form of jewellery, specifically bangles on her wrists whilst preparing meals for her family?

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?