i can help u with the sovereign appently to the book its worth nothing, i dont belive this i think there is still some collectors value on it but not much
I'm sorry, I forgot to say to CoinTalk when I answered your other thread. As you were told in that thread, making a coin into jewelry just about destroys any numismatic value, but a precious metal coin is always worth its melt value +/- 10%, so if you can determine the weight of the coin (without the bezel) just multiply the fineness of the gold by the current bullion value of gold, which you can find at www.kitco.com. The Mexican piece is Krause #KM481, a 41.6866g .900 fine gold coin commemorating the centennial of Mexico's independence from Spain in 1821. They were minted at the Mexico City Mint every year from 1921-31, and again in 1944-47. The catalog values are outdated, as the bullion value of the 1.2057 ounces of gold in the coin is around $590, but the catalog value of the 593,000 dated 1944 is stated to be only $500 in Uncirculated condition. I don't understand Guy's comment on your Sovereign. My Krause catalog values the 1908 7.9881g .9170/22 karat gold coin (KM#805, mintage 3,997,000) at $130 Unc. Bullion value of its .2354 ounces of gold is about $114. If you have quite a few coins, I suggest a visit to your local public library, where you will undoubtedly find the Standard Catalog of World Coins by Krause & Mishler, which will enable you to identify, and roughly value, all of them.
Thanks guys. Very helpful info. One question: the coins are held in the jewelry bezels by small tabs, they are not soldered in, and are removable. My mom rarely wore these. I assume since they are not permanently attached, the coins retain their colllector's value instea of spot gold price. Am I correct?
Not entirely. Since gold is so soft any competent dealer/grader would be able to identify the scrapes and scratches along the rims as proof of the coins having been in a bezel at some time. They would discount their buy price accordingly and label the coins as "former jewelry".
for the Sovereign can you see if there is a letter (mint mark) above the 9 & 0? for examples look here http://www.goldsovereigns.co.uk/1908sovereign.html If theres a C then it will be Quite valuable.
this is the best shot i can get of the date, it doesn't appear to have anything there, perhaps an L. This is obviously a hobby requiring good eyesight!
It does not look like there is any mint mark on that Sovereign. If there was a C like Skylark mentioned it would of meant it was minted in Canada, and the Canadian mintages were very low compared to other mints of the British Commonwealth.