Why are rubies red and emeralds green? Their colors come from the same metal in their atomic structure
Even the color of blood comes from the protein hemoglobin ... Rubies and emeralds are great examples of how a small amount of ...
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What does the color of period blood mean? What’s normal and what’s not
Period blood color variations, such as bright red, brown, or black, are typically normal and reflect changes in menstrual flow. However, unusual colors like orange or gray combined with discomfort ...