Gold, silver and cash

Q: We are in possession of a gold ring, also made up of diamonds, the ring was valued a year ago R18000.00, the weight is approx 3.93grams, is zakaat payable? I know the Nisaab for gold is 87.8 grams.

Q: Can zakat be paid off in gold? Instead of selling some of the jewellery to pay zakat can we distribute some of the gold as zakat? For example we have to pay Rs, 52,000 in zakat, so we distribute 4 gold bangles equalling 1 tola of gold which would equal Rs.52,000 (assuming market rate is 1 tola=52,000.). Is this okay? Or do we have to sell the 4 gold bangles then pay the zakat in 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?