Ruby and sapphire are varieties of the mineral corundum. - Courtesy Hamilton Jewelers Ruby is one variety of the corundum mineral species, which also includes sapphire. Ruby is highly regarded and can ...
False-Positive Mammograms Discourage Some Women from Future Screenings Sep. 2, 2024 — A false-positive mammogram may deter women from future screenings, according to a new study. But staying on ...