The anisotropy parameter v2 carries information about early interactions in high-energy nuclear collisions. We present STAR measurements of v2 for pions, kaons, phis, protons, Lambdas, Xis and Omegas. The data sample from RHIC run-IV allows us to measure identified particle v2 up to pT~9 GeV/c, providing us with the first identified particle v2 data in the pT region (pt > 6 GeV/c) where parton energy loss in medium and fragmentation in vacuum are expected to provide a simple description of v2. The v2 of multi-strange hadrons phi(ss) and Omega(sss) are similar to those of non-strange mesons and baryons respectively. This is a strong indication for partonic collectivity in collisions at RHIC. These measurements test quark-number scaling at intermediate pT (1.5-5 GeV/c): an observation that may demonstrate that quarks and gluons become de-confined in high-energy nuclear collisions. The centrality dependence of v2 will be discussed and comparisons will be made to model predictions.