This specific 3D model, "Diamond ring 3D print model 82", is an asset made available by "Unknown author".
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The licensing terms for this digital asset are governed by "Unknown license".
STL (Stereolithography, filesize: 3.29 MB), OBJ (OBJ, filesize: 9.74 MB), 3DM (Rhinoceros 3D, filesize: 53.1 MB)