whats the best  alloy  for 18K gold granulation?
456684
I'd assume silver, because that is what just about always has been used to harden 24k (pure) gold..
267064
yes gold is based on a 24 part scale for example when u have 14 kt gold u have 14 parts gold and 10 parts other material generally your gold vendors use nickel in white gold and for yellow gold generally copper zinc or sometimes a palladium so anything under 24kt gold is mixed with other material in one hand to cut the gold and in the other to make the gold stronger due to the malluability of gold.
1157571
http://www.kitco.com/charts/livegoldnewyork.html\n\n Gold \n Silver \n Platinum \n Palladium \n Rhodium \n\n can be found here
691661
Gold plating is typically so thin unless you have a real lot of it it would not be worth the trouble.  A gold plated ring would probably contain less than 10 mg of gold - about 20 cents at $600 per ounce.  If you dissolve the entire jewelry in aqua regia (a mix of nitric acid and hydrochloric acid) and then neutralize, the gold can be precipitated either electrochemically or by a more active metal such as zinc.  Good luck.  A whole lot of mess and danger for a few dollars worth of gold.
442093
yellow gold and white gold are the same in the allergy department.  \nstart looking at platinum, but beware that platinum dulls very quickly and i'm not sure if jewelers can get it to shine again.\n\ngosh....i feel for you.  ask jewelers if there are any treatments for the gold that would put a barrier between your skin and the metal...maybe some kind of coating??
1039864
If you can measure the weight and volume of the ring, you could find its density.  The value will be different depending on what purity it is (24k will be denser than 12k, for example).  Most gold in jewelry is not 24k, but some alloy with nickel, copper, etc. that makes it harder.  These alloys are also how you get white, pink, and green gold.\n\nBiting a ring will only give you marks if it is 24k gold.\n\ndensity would be the easiest way, I'd say.  (density = mass/volume)\nYou'll need the equipment to measure pretty small masses and volumes, though, which most people don't have in their kitchens.
1072945
Gold melts at 1945 ° F or 1063 ° C...
682948
The latest technology is bio extraction using plants and microbes to extract gold from the source rocks.\n\nI suggest that you go in for cyanide method. Not free cyanides but in the complexed form.
767709
iron \nbronze\nbrass\nzinc (Jia Jing 15-20% zinc)\n\nMore details on Alloy Compositiob, see\nhttp://www.britishmuseum.co.uk/product.aspx?ID=1034\n\n"the coinage alloy from bronze to brass occured during the early part  of the 16th century, specifically during the later Hong Zhi period"
237340
low range is best with a small diameter rod, e7018 or e 7014 3/32 diameter . it will be difficult if the metal is less than 1/16 in thickness. strongly suggest mig welding.
610534
They don't issue 24K gold, as it is too soft.\n\nIt can be 24K plated, but you should be able to twist it with ease.
467146
Let's see , 14 carat gold is 58.3 % gold, on 4/17/2006, gold is at abou 633 USD / ounce. 5 grams is bout .176 ounces, so $111.64 for 5 grams. 58.3% of that is 65.09 USD. Give a little for the other alloy metals , maybe 66 USD (53.48 Euros).
567090
24 karat gold is pure, 100% gold\n14 karat is 58.3% gold, plus other metals such as silver and copper.\n\nSo you would need to melt the gold with silver (for example) - the amount of cheaper metals would need to be 71.5% of the amount of gold you have to get the correct blend. (calculation: 171.5 / 100 = 0.583)
759114
How to Melt Gold\n\nMelting gold is easy and fun, especially useful for casting gold items or pouring gold ingots from scrap gold or gold dust. \n\nSteps \nGet your scrap gold material \nPlace in crucible \nTurn on acetylene torch \nPoint at gold until melted \nUsing crucible tongs, pour into ingot mold or other shape (or bucket of water if making gold shot). \nCool gold piece, turn off torch and enjoy. \n\n\n\nTips \nA little flux always helps keep the gold liquid. \n\nDefine flux:\n. (Chem. & Metal.) Any substance or mixture used to promote the fusion of metals or minerals, as alkalies, borax, lime, fluorite.\n\n\nWarnings \nDon't burn yourself and wear welder's goggles. \n\n\n\nThings You'll Need \nHow to use an oxy-acetylene or oxy-propane torch.
1043035
pllatinum is not white gold. The pure element Au is not white gold. \n\nWhite gold is an alloy of gold mixed with white metals such as nickel, silver, and palladium. Like yellow gold, white gold glitters in a variety of carats: 18ct, 14ct, or 9ct. \n\nEighteen-carat white gold consists of 75% gold mixed with 25% white metals. New white gold rings are usually coated with a hard protective finish of rhodium, a silver-white metal like platinum. To keep a white gold ring looking its best, Gillett's recommends an annual replating of rhodium, since the coating wears off over time. \n\nPlatinum, an entirely different element than gold, is a white metal that is denser, heavier, and longer-wearing than gold. It's usually used in almost pure form and does not require a protective coating. Platinum is quite expensive, a platinum ring is perhaps twice the price of a similar ring made in white gold.
812205
Put a metal which has higher activity than Silver
588354
might be  mercury compound(only  Mercury can dissolved gold))