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The Bunder diamond project comprises a cluster of diamondiferous volcanic pipes and dikes intruding Paleoproterozoic and Mesoproterozoic intracratonic sedimentary rocks covering the Archean Bundelkhand craton, underlain by depleted peridotitic mantle lithosphere. The discovery resulted from an 18-month regional exploration program targeting potentially well preserved diamond orebodies within Neoproterozoic to Paleoproterozoic intracratonic sedimentary rocks along strike from the Majhgawan diamond mine, or possibly more eroded bodies within the exposed Bundelkhand craton to the north. High-chromium magnesiochromites and, in particular, rare G9/G10 garnets from stream sediment samples proved to be effective regional diamond indicator minerals in terms of their dispersion, recovery, and analysis. Follow-up stream sediment surveys for indicator minerals, ground magnetic surveys, and soil geochemical surveys plus visual outcrop prospecting proved to be fit for the purpose and successful in locating diamondiferous source rocks. Key factors for the Bunder discovery were the funding and creation of a dedicated team with a strong commodity focus that was able to secure exploration licenses ahead of the competition, negotiate local exploration access, and then apply local knowledge to tried-and-true exploration and sampling techniques. The ability to prioritize, process, observe, and analyze stream sediment indicator mineral samples in a timely manner at in-house laboratories was crucial.

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