There's no common term "black penny". I assume you mean English pennies* because U.S. cents from that time period are small coins, the same size as modern 1¢ coins.
Because you didn't give dates, the best I can do is point you to a website that lists current values for English coins. The prices are given in £ sterling; multiply by 2 for a rough conversion to U.S. $.
(*) The plural is pennies Words with apostrophes are not plurals, they're possessive nouns, so "Penny's" means something belonging to a woman named Penny.
The US has never made lead pennys, but if you mean the 1943 Zinc coated steel Lincoln cents, average value is 10 cents.
No U.S. coin dated 1967 will have a mintmark, they were not used from 1965-1967.
1 cent all Canadian pennys have double maple leaves on them, dose not add extra value
You need to give more information but if you got it in circulation it is worth face value. If it is a wheat penny a few cents.
Illegal poachers kill Black Rhinos and cut off their horns which are sold for large amounts of money. The remains of the Rhino is left to rot as it has no value.
The value of the 'stone' -- meteorite? -- probably depends on who wants to purchase it and how much the buyer is willing to pay for it. The diamond value, especially of a 'black diamond' may not be as high as its 'from space' value. This is not a large market, so you'll need to discover the market and then ask the question there.
Black Skin No Value was created in 2002.
If we are moving from a large value to a small value we move the decimal point to the left.
A Euro is similar to an American dollar or British pound, however it does not necessarily have the same value. The valuation is determined daily on the world markets.
The value of a 1803 large penny will depend on the condition of the coin. If the coin is in mint condition, the value is an estimated $256.00.
The value depends on the date, mint mark, and condition. Without knowing those details, it's impossible to give a specific answer. At minimum, wheat cents are worth at least 3 cents.
Impossible to answer without having gun in hand. While average value can be stated for a modern firearm with a large number of sales. the value of an antique firearm is driven HEAVILY by the condition- which we can't see. You need a hands on appraisal.