Is it jewellery or jewelry?
Both are correct. Jewellery is Canadian and British spelling. Jewelry is for our American friends.

Is it gemmology or gemology?
Both are correct. Gemmology is the Canadian and British spelling. Gemology is for our American friends.

Is it colour or color?
Both are correct. Colour is the Canadian and British spelling. Color is for our American friends.

When doing searches try both spellings