There are waaaaaaay too many variables to make a guess. It might be possible to approximate its value by finding a similar pendant on eBay. The best bet is to get a professional appraisal. They aren't free, but they are the best way to find accurate information.
It all depends on the cameo you choose and what you wear it with. The cameo pendant can be conservative or sexy, it is all up to the rest of your outfit.
One may purchase a cameo style pendant from The Bradford Exchange, Overstock and eBay. The pendant styles available include collectible, vintage and modern styles.
A typical design of a Cameo necklace is a simple silver chain pendant style with a cameo portrait of agate, glass or shell. This portrait would be carved by hand and placed on a background of a different colour or material.
Modified coins have no collector value. Any value would be associated with the pendant.
an ivory pendant with a ship an a eoman waving goodbye to someone
Take your pendant to a jeweler and request an answer in person.
No web site can give you the value of any object, sight-unseen. Take your pendant to a jeweler, or to a pawn shop and ask for a valuation.
$1.50
The best value for money mini pendant lights are those that can be purchased from Sainsburys. They are a little more expensive than some but they are excellent quality.
100.00
5000.0000
Modified coins have no collector value. Any value the pendant may have would be as a piece of jewellery. The coin itself might get up to £2 GBP if it was in mint condition and had not been silver plated.