I'm guessing CGI certified?
c = diamond
"925C" on a diamond ring most likely refers to the sterling silver content of the ring. Sterling silver is comprised of 92.5% pure silver and 7.5% other metals for durability.
It is the authenticity of the diamond contained inside your silver ring.
Draw a diameter on the circle from A to B and mark the midpoint, C (center of the circle). Mark the midpoint, D, of one of those radii (halfway between center and edge). Draw a perpendicular line to the diameter from D to the two edges of the circle, E and F. Draw radii from E to C and F to C. Lines AC, EC, and FC mark the three equal parts of a circle.
what does ev1 stamped on the inside of a marquise cut 14 carat gold diamond ring?
His mark is "Dale Tiffany Inc.", and also includes a copyright logo (a "c" in a circle).
The stamp "925" inside a silver ring indicates that the ring is made of sterling silver, which is an alloy containing 92.5% silver and 7.5% of other metals. "M C" may be the maker's mark or initials of the manufacturer who produced the ring.
I believe the FM is Franklin Mint. Not sure about the number. Might be the whole is the copyright designation since the copyright symbol (c in a circle) precedes the fm85
Oh, dude, that COP 89 7 with a circled 'c' stamped inside your ring means it was made by the Columbia Gem House. The COP stands for Columbia, and the circled 'c' is their trademark. So, like, now you know where your bling came from. Cool, huh?
It was first discussed in 1904, and codified in the 1906 copyright act.
When buying diamonds you need to consider the 4 C's - Cut, Clarity, Color and Carat. The last one inform you of the size of the diamond. For more have a look at the following http://adiamondvault.com/article/diamond-carat-guide/
It stands for Carat or Karat. Which describes gold purity 24c is 100% pure gold 12c is 50% etc...