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Start Over You searched for: Media Type Minerals Remove constraint Media Type: Minerals Subject Geology Remove constraint Subject: Geology

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161. Orthoclase, 11147

162. Orpiment, 4233

163. Opal, 11711

164. Opal, 11710

165. Opal, 1017

166. Olivenite, 9225

167. Okenite, 5728

168. Niter, 9034

169. Niter, 9032

170. Niter, 9031