Question

What is earth's lower mantle made of?

Answer 1

┏─━─━─━─━∞◆∞━─━─━─━─┓
✭✮ӇЄƦЄ ƖƧ ƳƠƲƦ ƛƝƧƜЄƦ✮✭
┗─━─━─━─━∞◆∞━─━─━─━─┛

The most common compound is silicate perovskite, made up of magnesium, iron, silicon and oxygen. The other common main component of the lower mantle is ferropericase, which is made of magnesium, iron and oxygen.
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Answer 2

here is your answer . the earth's lower mantle is made of compound silicate perovskite hope it will help you.