( ( Some pigments ) ( ( ( ( ( are ( derived ( from ( natural ( ( ores and ) minerals ) ) ) ) ) , ) yet ) ( are synthetic ) ) . ) )
(ROOT (S (NP (DT Some) (NNS pigments)) (VP (VP (VBP are) (VP (VBN derived) (PP (IN from) (NP (JJ natural) (NNS ores) (CC and) (NNS minerals))))) (, ,) (CC yet) (VP (VBP are) (ADJP (JJ synthetic)))) (. .)))
Some pigments are derived from natural ores and minerals, yet are synthetic.
(ROOT (S (NP (DT A) (JJ synthetic) (NN diamond)) (VP (VBZ is) (RB not) (VP (VBN considered) (NP (DT a) (NN mineral)) (SBAR (IN because) (S (NP (NNS minerals)) (VP (MD must) (VP (VB be) (VP (VBN created) (ADVP (RB naturally))))))))) (. .)))