( ( The deposits ) ( ( ( ( are ( 100 ( percent ( quartz crystal ) ) ) ) and ) ( is ( used ( for ( making glass ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NNS deposits)) (VP (VP (VBP are) (NP (CD 100) (NN percent) (NN quartz) (NN crystal))) (CC and) (VP (VBZ is) (VP (VBN used) (PP (IN for) (S (VP (VBG making) (NP (NN glass)))))))) (. .)))
The deposits are 100 percent quartz crystal and is used for making glass.
(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))))))) (. .)))