( ( ( ( Quartz , ) ( used ( in ( ( ( ( glass making ) , ) and ) ( ( feldspar , ) ( used ( in ceramics ) ) ) ) ) ) ) , ) ( ( are ( found ( in ( this ( rock formation ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NNP Quartz)) (, ,) (VP (VBN used) (PP (IN in) (NP (NP (NP (NN glass)) (VP (VBG making))) (, ,) (CC and) (NP (NP (NN feldspar)) (, ,) (VP (VBN used) (PP (IN in) (NP (NNS ceramics)))))))) (, ,)) (VP (VBP are) (VP (VBN found) (PP (IN in) (NP (DT this) (NN rock) (NN formation))))) (. .)))
Quartz, used in glass making, and feldspar, used in ceramics, are found in this rock formation.
(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))))))) (. .)))