You didn't say what country the coin comes from, but given the date it's unlikely to be worth more than face value.
BTW, that's D G, not D C
The value of a 1973 Elizabeth II D.G. Regina 10 cent piece can vary depending on its condition and any unique characteristics it may possess. In circulated condition, it may only be worth its face value, but if it's in uncirculated condition or has a mint error, it could be worth more to a collector. It's best to have it appraised by a professional coin dealer or numismatist to determine its exact value.
Elizabeth 11 Regina silver 50 cents
It depends on the denomination and condition of the coin. "Elizabeth II Regina" means "Elizabeth the Second, Queen", and "South Africa Suid-Afrika" is simply the name of the country, first in English and then in Afrikaans. All coins issued in South Africa in 1957 had both phrases ("Elizabeth II Regina" and "South Africa Suid-Afrika") on them.
It depends on the denomination and condition of the coin. "Elizabeth II Regina" means "Elizabeth the Second, Queen", and "South Africa Suid-Afrika" is simply the name of the country, first in English and then in Afrikaans. All coins issued in South Africa in 1957 had both phrases ("Elizabeth II Regina" and "South Africa Suid-Afrika") on them.
It depends on the denomination and condition of the coin. "Elizabeth II Regina" means "Elizabeth the Second, Queen", and "South Africa Suid-Afrika" is simply the name of the country, first in English and then in Afrikaans. All coins issued in South Africa in 1955 had both phrases ("Elizabeth II Regina" and "South Africa Suid-Afrika") on them.
What country? What denomination? Is it real gold, or just a brass circulation piece? Please post a new question with more details to help ID it.
A 1962 Canadian silver dollar with the image of Elizabeth and text of ELIZABETH II DEI GRATIA REGINA is worth $11.42 today. This is because of the value of the metals used to make the silver dollar.
More information needed - what is the denomination of the coin
Rhodesia Elizabeth the second 25c 1964
todays current Rand value. Of threepents 1956
You would need to provide more information. "elizabeth DGregina" (it almost certainly actually reads "ELIZABETH II D G REGINA") is abbreviated Latin for "Elizabeth the Second, by the Grace of G-d, Queen" and implies that the coin was produced by Great Britain or by one of the members of the British Commonwealth for which Queen Elizabeth II serves as monarch.
Quel est la valeur de cette pièce
I don't believe there have been any gold 50 cent coins dated 1957 with Elizabeth II on them. Instead, they'd be merely gold plated. Most likely, you've got a Canadian half dollar that has been gold plated, the gold plating adds no value and its worth about $7.