Gold, silver and cash

Q: My wife has 5 tola gold and £600. How much would her zakat be?

Q: One of my mother's sister lives in UK. She gave a gold necklace, a pair of ear rings, finger ring and a pair of bangles to my daughter (who also stays there after marriage) to give it to me so that I can use it in my daughter's marriage. My daughter has given it to me, but I don't want to keep such a precious gift.

1. What can I do?
2. Shall I need to take out zakaat for that?

Q: How the zakat on paper money calculated?

Q: How is Zakaat on paper money calculated?

Q: If someone  has 24, 22 and 18 karat gold jewellary, then how will zakaat be calculated? The price of 24 karat gold is Rs. 3100/g. the price of 22 karat gold is 2900/g and price of 18 karat gold is 2400/g. 

Q: I would like to know the correct method for paying Zakat on Gold. As far as I know we have to pay 2.5% of the total gold we own converted to the currency of the area you are living in.

Q: If we are giving gold as Zakaat, should we take into consideration the current gold value or the selling price? If we sell it, we only get half of its value.

Q: In the following article on your website: http://alhaadi.org.za/articles/qurbani/668-who-is-required-to-perform-q… is mentioned that "Every adult Muslim, male or female, who owns 613.35 grams of silver or its equivalent in money, personal ornaments, stock-in-trade or any other form of wealth which is surplus to his basic needs, is under an obligation to offer a Qurbani."
Can you please give the reference of Hadith or other authentic books as to how the figure of 613.35 has been deduced?

Q: A young Mufti (scholar) said to calculate zakaat based on gold. Now he changed his ruling and says to give it based on silver. So, based on gold, the zakat was 3000$. Today when he told the people to do it based on silver, todays silver price was 500$. So what must the people do on paid zakaat, count what is paid on gold as okay and from here on pay of silver?

Q: Is zakaat fardh upon eighteen and twenty four carat gold?