MINERAL OF THE QUARTER By Ronald L. Parker Senior Geologist, Borehole Image Specialists, P. O. Box 221724, Denver CO 80222 | ron@bhigeo.com
DIOPTASE The Emerald Imposter
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This is an eye-popping aggregate of lustrous, intensely blue-green, cm-scale dioptase crystals from the Onderra Mine of the Kaokoveld Plateau, Kunene Region, Namibia. 3.5 cm in long dimension. Photo by Annette Slade. Used with permission from Collector’s Edge Minerals, Inc. https://collectorsedge.com/
OUTCROP | July 2021
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Vol. 70, No. 7 | www.rmag.org
