Ruby is made of aluminum oxide (also known as corundum), and its hue varies from blood red to pinkish red. The inclusion of chromium, which accounts for around 1% of the overall composition, gives Ruby its red color. The majority of quality rubies are mined in Burma, where they are discovered to have a blood red or pigeon blood shade of red, which is why they are highly valued. Ruby is a mystery gemstone; it is one of the cardinal stones, and it is known in Sanskrit as "ratnaraj," which means "k
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