Jewellery and 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?

Q: I have a query regarding rings for men; I know that it has to be silver but I was made aware of the following hadith today:

It was narrated from ‘Abd-Allah ibn Buraydah from his father (may Allah be pleased with them both) that a man came to the Messenger of Allah (peace and blessings of Allah be upon him) and he was wearing a ring of gold. He said: “Why do I detect the stench of idols on you?” So he threw it away. Then he came and he was wearing a ring of iron, and he said: “Why do I see you wearing the jewellery of the people of Hell?” So he threw it away. He said: O Messenger of Allah, of what should I wear (a ring)? He said: “Wear (a ring) of silver, but no more than a mithqaal (a measure of weight).” Narrated by Abu Dawood, al-Tirmidhi and al-Nasaa’i.

Does this mean that the ring cannot exceed the weight of a mithqal (approx. 4.25grams) of silver at all or is it just preferable that it be that weight because according to what I heard Nabi (SAW)'s ring weighed that much.

Q:

1. If women have gold, silver, and diamond crucifixes, aum, and Buddha jewellery before excepting Islam, what should they do with them? Should they have them melted and redesigned or should they bury them?
2. What is the punishment for Muslims selling jewellery for kuffaar religions?
3. Can Muslims wear jewellery that has the name of Allah and ayaat from the Quran in lockets when we don't have wudhu?

Q: Are female muslims allowed to wear anklets?

Q: 

1. Is it Sunnah to were a silver ring?

2. If yes to the above question. Must it be pure silver? Should something be inscribed on it? How must it weigh? Which hand and finger to wear it is Sunnah?

Q: Please let us know whether men can wear white gold? I.e. gold coated with Rhodium. It is look like silver.

Q: Is a belly ring permissible?

Q: We know that one can only use rings made dominantly of gold or silver. Can one use plastic rings?  Can one sell imitation rings which are impermissible to others? Would it make a difference if the customers were muslims or nonmuslims?