It depends, many low quality counterfeit coins are simply made in lead and would be essentially worthless, but a few high-quality counterfeit coins are actually made out of silver and would be worth the silver value.
The coin is a worthless counterfeit. The United States issued Trade Dollars between the years of 1873 and 1885.
Trade dollars were not minted at San Francisco in 1879. If you have a Morgan dollar it's worth between $14 and $20 depending on condition. If your coin does bear the words Trade Dollar and an S mint mark for that year it's almost certainly counterfeit. There are many counterfeit dollar-sized coins produced each year, mostly in the Far East. Their quality ranges from laughably bad, with incorrect dates and images, up to almost undetectably good.
A silver dollar from the year 1020 is worthless, as it is a counterfeit.
A couple of years in a Federal penitentiary.
What is the value of a 1791 trade dollar
The first Trade Dollars were minted in 1873. If your coin says Trade Dollar on the back and is dated 1872 it is a counterfeit. If it does not say Trade Dollar, then it could be a genuine Liberty Seated dollar. You should have it inspected by a dealer or certification agency because its value could range from $300 to $1000 depending on condition.
All 1879 trade dollars were proofs and the entire trade dollar series is heavily counterfeited. Most likely, your coin is a counterfeit, but should be examined by someone who knows a lot about coins (good places to start are coin shops and jewelry shops) if you believe it to be genuine, but most likely it is a counterfeit. If genuine it could be worth hundreds to thousands of dollars.
The 1851 Indian dollar is a well known novelty coin (technically not a counterfeit, as there was no genuine version in the first place). It was made in China, contains no silver, and isn't worth anything.
If you have a Seated Liberty dollar dated 1875, then you have a counterfeit -- the last year for them was 1873
There were no Trade Dollars made in 1882 with a CC mintmark -- must be a counterfeit. Either that or it's a Morgan Dollar, like the one in the picture here : http://www.coinfacts.com/silver_dollars/morgan_dollars/1882_morgan_dollars/1882cc_morgan_silver_dollar.htm In circulated condition, an 1882-CC Morgan Dollar is worth about $70.00
Its probably only worth its weight in silver. As long as it is not sold as being real and is clearly sold as a replica or example of a counterfeit item, it is legal to sell.
It's still worth a dollar.