( ( mineral Any ) ( naturally ( ( formed ( crystalline ( ( solid ( with ( ( ( a ( definite ( chemical composition ) ) ) and ) ( a ( characteristic crystal ) ) ) ) ) structure ) ) ) . ) ) )
(ROOT (S (NP (NN mineral) (NNS Any)) (ADVP (RB naturally)) (VP (VBD formed) (NP (JJ crystalline) (ADJP (JJ solid) (PP (IN with) (NP (NP (DT a) (JJ definite) (NN chemical) (NN composition)) (CC and) (NP (DT a) (JJ characteristic) (NN crystal))))) (NN structure))) (. .)))
mineral Any naturally formed crystalline solid with a definite chemical composition and a characteristic crystal structure.
(ROOT (S (NP (DT A) (NN mineral)) (VP (VBZ is) (VP (VBN described) (PP (IN as) (NP (NP (DT a) (JJ solid) (JJ natural) (NN material)) (PP (IN with) (NP (DT a) (NN crystal) (NN structure))))))) (. .)))