GWD6-Q24:

Each of the following is mentioned in the passage as a difference between G10 garnet and other versions of garnet EXCEPT

A. level of oxidation

B. commonness of occurrence

C. chemical signature

D. place of formation

E. appearance in conjunction with diamonds

前面的帖子把23和25都讨论了，可是，有米有人告诉我Q24的答案，使A还是E呢？万分感激！

answer is A. Pls refer to the following passage for details:

For example, G10 garnets,

a type of garnet typically found in

(45) diamond-rich pipes, are lower in

calcium and higher in chrome than

garnets from barren pipes. Geo-

chemists John Gurney showed that

garnets with this composition were

(50) formed only in the diamond-stability

field; more commonly found ver-

sions came from elsewhere in the mantle.

Which one could help me explain this question?

Thanks