Vancouver, British Columbia–(Newsfile Corp. – May 10, 2021) – Ridgestone Mining Inc. (TSXV: RMI) (OTCQB: RIGMF) (FSE:4U5) (“Ridgestone“) is pleased to announce a maiden National Instrument 43-101 (NI 43-101) Mineral Resource Estimate for its Guadalupe y Calvo (“GyC”) gold-silver project in Chihuahua, Mexico. The maiden mineral resource was estimated for two principal mineralized structures, the Rosario and Nankin veins, captured within a combined pit-constrained and underground mineral resource model. Mineralization at GyC remains open for expansion both along strike and down-dip at depth. The GyC project is comprised of 20 square kilometres. Ridgestone entered into an option agreement with Endeavour Silver in December 2020 to acquire a 100% interest in the property.