Check out this chinese company, via Zerohedge:
“Get Your Fake Tungsten-Filled Gold Coins Here”
From the website’s Tungsten Heavy Alloy Scan Gold Coin section:
Tungsten is the only lower value metal that has a specific density close enough to gold to fabricate passable counterfeit pieces of the same size and weight as genuine Pictures of tungsten fake gold coins and ingots. Over the years, there have been a few isolated reports of smaller tungsten fake gold coin found to have been drilled to remove some of the gold which was replaced with tungsten. However, tungsten fake gold coin is far more profitable to fabricate larger original bars of tungsten that are then scanning gold.
Because the existence of counterfeit tungsten fake gold coin could have such a huge impact on the financial markets, there is a huge potential for deception and misinformation to be passed around. Be very careful about automatically believing any story you may hear. For your own protection, tungsten fake gold coin would be better to take physical possession of the smaller sizes of tungsten fake gold coins and now, and know that what you own genuine solid tungsten fake gold coin. [ZH: reread that sentence: “genuine solid tungsten fake gold coin”]”
http://www.zerohedge.com/news/2012-09-24/get-your-fake-tungsten-filled-gold-coins-here
Yup... Another thing brought to you by China.