( ( in ( ( ( ( hexagonal minerals ) such ) as ) ( quartz ( -LRB- Fig ) ) ) ) . )
(ROOT (FRAG (PP (IN in) (NP (NP (JJ hexagonal) (NNS minerals)) (JJ such) (IN as) (NP (NNP quartz) (-LRB- -LRB-) (NNP Fig)))) (. .)))
in hexagonal minerals such as quartz (Fig.
(ROOT (S (NP (DT The) (NN mineral) (NN quartz)) (VP (VBZ is) (VP (VBN used) (S (VP (TO to) (VP (VB produce) (NP (NN glass))))))) (. .)))