Investor Presentaiton

CAUTIONARY NOTE REGARDING ESTIMATES OF MEASURED, INDICATED AND INFERRED RESOURCES The Preliminary Economic Assessment ("PEA") referenced herein was prepared in accordance with Canadian National Instrument 43-101 (NI 43-101). CORE is not subject to regulation by Canadian regulatory authorities and no Canadian regulatory authority has reviewed the PEA or passed upon its accuracy or compliance with N143-101. The terms "mineral resource", "measured mineral resource", "indicated mineral resource" and "inferred mineral resource" as used in the resource estimate, the PEA and this presentation are Canadian mining terms as defined in accordance with NI 43-101; however, these terms are not defined terms under the U.S. Securities and Exchange Commission's ("SEC's") Industry Guide 7 and are normally not permitted to be used in reports and registration statements filed with the SEC. The estimation of measured resources and indicated resources involves greater uncertainty as to their existence and the legal and economic feasibility of extraction than the estimation of proven and probable reserves. Conversion of mineral resources to proven and probable mineral reserves generally requires a further economic study, such as a preliminary feasibility study. The PEA is not a preliminary feasibility study and does not support an estimate of proven and probable mineral reserves. Investors are cautioned not to assume that all or any part of an inferred mineral resource exists or is economically or legally mineable. Investors are also cautioned not to assume that all or any part of measured or indicated resources will ever be converted into mineral reserves. In addition, the SEC normally only permits issuers to report mineralization that does not constitute mineral reserves as in-place tonnage of mineralized material and grade without reference to unit amounts of metal. Please see the Company's press release dated September 24, 2018 for more detail regarding the PEA. NON-GAAP MEASURES This presentation contains certain non-GAAP financial measures. A reconciliation of each such measure to the most comparable GAAP measure is presented in the Appendix hereto. Preliminary all-in sustaining cost estimates included in this presentation exclude corporate overhead costs. This measure is not a measure of financial performance under GAAP. We strongly advise investors to review our financial statements and publicly filed reports in their entirety and not rely on any single financial measure. See the Appendix for a reconciliation to GAAP. CONTANGO ORE GOLD SILVER COPPER 3

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