Hi! I found this answer on the internet.....use oven cleaner!! Here is the text of the webpage, and I will list the link at the bottom.
This is a emotionally difficult post to write, but if you've had this experience or know someone who has had their jewelry damaged but not melted because it was in a fire, I'm going to tell you how to save it and make it look new.
I can't give you a photo demonstration because our home burned 20 years ago, but the photo above is a few of my pieces I saved.
Just a couple of days before our fire, we had gone out of town. All my gold pieces I had packed in a plastic jewelry box for traveling. Other than loosing them, nothing could have been worse. My Son found this big chunk of melted plastic and jewelry.
Off and on for a year I would get the mess out and pry my jewelry of the chunk of plastic. It was still coated with black thick film of plastic and gunk. I placed it in a safe place and a couple of years after the fire I saw a commercial, I don't even remember what it was for, but they were offering a free booklet how to clean old gold with oven cleaner.
A light bulb went off in my head.....oven cleaner cleans really burnt on crud off the oven. I had nothing to loose by giving the oven cleaner a try.
Figuring out how to, was risky and frightening, but it paid off.
1) I lined a cookie sheet with aluminum foil.
2) placed the jewels on the cookie sheet and baked it until it was hot to the touch (350 degrees)
3) Took them out of the oven when they got hot to the touch. Immediately sprayed them with the oven cleaner.
What was happening was a miracle ! I rinsed them good with water and repeated the process( changing the aluminum foil each time) until all the melted plastic and gunk was gone !
My jewelry looked as if nothing had ever happened and new again.
Here is the link to the webpage:
glenda World How to Clean Jewelry That Has Been Through House Fire or...