You are likely referring to a British 1919 Penny (KM#810). It is made of bronze, weighs 9.45 grams, measures 30.8mm across, has a portrait of King George V facing left on the front of the coin, and a picture of Britannia seated and facing to the right on the back of the coin.
About 118.2 million were produced in 1919 at three different mints. The most common (over 95% of the aggregate mintage) was produced at the Royal Mint and has no mintmark; it is worth (according to the Standard Catalog of World Coins) about US$0.80 in Fine condition, about US$2.50 in Very Fine condition, about US$17.00 in Extremely Fine condition, and about US$50.00 in Uncirculated condition.
The coin was also produced at the Heaton Mint and has a small "H" mintmark; it is worth about US$1.25 in Fine condition, about US$13.00 in Very Fine condition, about US$275.00 in Extremely Fine condition, and about US$1,000.00 in Uncirculated condition.
Finally, it was also produced at the King's Norton Mint and has a small "KN" mintmark; it is worth about US$4.00 in Fine condition, about US$25.00 in Very Fine condition, about US$400.00 in Extremely Fine condition, and about US$2,200.00 in Uncirculated condition.
Note that the 1919 Australian Penny is the same size and has the same wording on the front. The back, however, reads "Commonwealth of Australia" and "One Penny" - since you didn't mention such an obvious identifier, I presume that you refer to the British coin.
By the way, the phrase "GEORGIVS V DEI GRA BRITT OMN REX FID DEF IND IMP" is abbreviated Latin for "George the Fifth, By the Grace of God, King of All Britons [or "Britain"], Defender of the Faith, and Emperor of India."
how much is this worth to sell
In 1913 Wheat Penny value at an average of $1.25, one in certified mint state.
Most 1935 georgivs v del grs Britt coins are worth anywhere from $1-$10. These are rare half pennies. However, there are some collectible 1935 georgivs v del grs coins that can be worth upwards of $2000.
In circulated condition, your Great Britain penny is worth about 50 cents.DanUser:WorkingMan
5.00
A 1918 Georgivs V British coin with a denomination of 25 would likely be a silver crown coin. In poor condition, such a coin may have significant wear, damage, or corrosion, which can reduce its collector value. The value would depend on the specific condition and rarity of the coin.
The Canadian George V 5 cent coin was in circulation from 1914 to 1918. It is being sold online for between 2 and 5 dollars apiece.
what is the georgivs vi rex imperator 1 d 1954 coin woth
2500
I do not think it will devalue the stone any, but it has certainly devalued the coin. Modified coins have no collector value.
The 1921 one cent coin from British colonial territories featuring George V has a nominal value of one cent. In circulated condition, it is typically worth its face value. However, if it is in uncirculated or pristine condition, it could have additional value to collectors.
The 1920 Great Britain 3 Pence are worth about a $1 U.S. if they have been circulated. Fully uncirculated coins can be worth as much as $40.
This question doesn't have enough information for an answer because you didn't mention the coin's denomination. Also, it's redundant to ask what the value of something is worth.