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Vanalite: NaAl8V10O38·30(H2O)
Comments: Fragment of bright yellow powdery vanalite. Location: Kurumsak V Deposit, Kurumsak River Valley, Karatau Range, Ongtüstik Qazaqstan Oblysy (Southern-Kazakhstan Oblast'), Kazakhstan. Scale: Sample Size 0.025 cm. © Jeff Weissman / Photographic Guide to Mineral Species