Final answer:
Carbonates are the rock-forming minerals that fit the description of being light-colored or colorless, commonly found in sedimentary rocks and frequently combining with oxygen.
Step-by-step explanation:
The mineral that fits the description of being light-colored or colorless and commonly found in sedimentary rocks, as well as frequently combining with oxygen, is carbonates. Carbonates are minerals that contain the carbonate ion (CO3^2-) and are commonly found in rocks such as limestone and dolomite. These minerals are often light-colored or colorless, and they can react with oxygen to form various compounds, such as carbon dioxide.