Before even trying to use Google's Keyword Tool, take the time to brainstorm for ideas with friends, family and even post a thread in this forum asking for ideas for different ways to describe your work. It's not always a good idea to ask Etsy sellers since most tend to think like the artist or craftsperson and not a like a shopper.
Once you have a good list to work from, Go to
https://adwords.google.com/select/KeywordToolExternal?forceLegacy=true
(there is more than one Google Adwords Keyword Tool and this is the one I have found to be the most accurate in showing counts)
Enter your list of keywords in the "Word or phrase" box, one keyword phrase per line, such as,
handmade jewelry
handmade gemstone jewelry
sterling silver jewelry
Do not enter anything in the Web site box (this creates a filter that keeps Google from displaying many potential keyword phrases)
Do not enter anything in the Category box.
On the left side, uncheck the Broad Match box, and check the Exact Match box.
Enter the characters shown that verify that you are not a spammer or an automated tool.
Click the Search button.