Beautification

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:

1. A brother accepted Islam, but previously was a Christian who has tattoos on his arms, some are facial images, possibly Christian crosses too, is it permissible that he tattoos those images with plain ink so images are not visible to see what it represents or should he leave it alone? 
2. Will his wudhu and salaah be valid with the tattoos?

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: Is it permissible in Islam to have a tattoo on one's body? I performed salaah behind a person who has a tattoo on his skin. Is the salaah valid?

Q: It has been brought to my attention by a very close friend that there are contact lenses on the market, which if you wear it, your eye color changes, will this be Jaiz cause we are changing something which Allah Ta'ala has given us as a bounty.

Q: If a person has a tattoo which is into his skin,will his ghusl be valid?

Q: Is a belly ring permissible?