About $5-10.
10k refers to the ring being made from 10 karat gold. That does have value. The 'tiara' reference I am not sure about without seeing the style of the ring.
10-1000 USD depending on specifics
The brand CTO doesn't really affect the value; it stands for O.C. Tanner Company. Your value is going to be based on the gold value
The value of the gold will be based on the WEIGHT of the ring- a large man's ring could weigh twice what a small woman's ring would weigh. The current price (3 March 2017) for 10K gold is $16.55 per gram. The price of a new 10K narrow women's ring on Amazon is about $49. If selling a ring to a jeweler or pawnbroker, it would be discounted by roughly half of the retail value. They have to make a profit when reselling it.
A Portsmouth round is 5 dozen arrows shot from 20 yards, at a 60cm diameter target face consisting of 10 rings and the center bull. The scoring is known as as "10 zone"; the "X" ring (or the center bull) and the ring around it are worth 10 points, with each ring after that worth 1 point less, with the outside ring having a value of 1 point.
The ring contains 10 percent platinum,
This common card is worth less than 10 cents.
This common card is worth less than 10 cents.
Joe Szwaja was born on 1956-10-10.
Joe Mace was born on 1971-10-10.
Joe Kostal died on 1933-10-10.