Hi everyone!
First time on here! I've searched everywhere for an answer to my question but have had no such luck.

I have soldered a jump ring (half jump ring) to the top of an 18-carat yellow gold pendant (which was cast via lost wax casting method). I used 18ct gold wire solder bought from cooksongold. The area that I soldered looks slightly lighter than the rest of the pendant. Not like silver but not quite as yellow as the rest of the gold. I can see the difference if I look hard.

I'm not sure where I have gone wrong, however, I will note that I probably used too much solder during the process.

I don't want to take too much gold off as this may weaken the joint? I also filed away as much as possible.

Any suggestions?

Thank you in advance. And sorry that I cannot attached a photo (I have to have made 5 posts)
Natalie