crystal structure a. crystals have definite shape with flat sides b. crystals may be large or small B. Minerals are formed from cooling of magma, or grow from solutions C. Minerals are identified by observing their properties D. Mineral properties include luster color 
(crystal structure a. crystals; have; definite shape) (C. Minerals; by observing; their properties D. Mineral properties) (large or small B. Minerals; from cooling; of magma) (C. Minerals; are identified; by observing their properties D. Mineral properties)
crystal structure a. crystals C. Minerals large or small B. Minerals C. Minerals
have by observing from cooling are identified
definite shape
their properties D. Mineral properties
of magma
by observing their properties D. Mineral properties