Multiple Choice
Minerals in geodes (see below) form spectacular euhedral crystals because ________. 
A) all of the elements incorporated in the crystals are in plentiful supply
B) the crystals have abundant room to grow in their hollow surroundings
C) minerals within geodes are always framework silicates
D) minerals within geodes always contain iron
Correct Answer:
Verified
Correct Answer:
Verified
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