SILVERCORP METALS INC

Sampling, Analysis and Data Verification

Drill core processing is completed by Silvercorp employees in accordance with a standard procedure. Core recovery is measured followed by detailed logging of the core with lithological, vein and mineralization contacts identified and recorded. The core is photographed and sampled on 2 m maximum intervals and at geological or mineralization contacts. Core is cut in half with a rock saw with one half bagged and secured for shipment to the laboratory, and the other half retained in the core tray for future reference.

Channel samples are collected along sample lines perpendicular to the mineralized vein structure as well as from walls of cross-cut tunnels and bottom of trenches. Samples include vein material and associated wall rock.

Samples were shipped from the Gaocheng site to an ALS Laboratory in Guangzhou between 2008 and 2014. Since 2014, as a primary laboratory, samples have been shipped to the onsite laboratory at Gaocheng, which is owned and operated by Silvercorp. It is not certified by any standards association.

Silvercorp has established Quality Assurance / Quality Control (QA/QC) procedures that cover sample collection and processing at the GC Property. These QA/QC protocols have been progressively refined since 2011. Certified Reference Materials (CRMs) and coarse crushed blanks have been included with drilling samples since 2011, and with underground samples since 2014. Field duplicates have been included with drilling samples since 2012 and with underground samples since 2014. Check (umpire) samples (pulp duplicates) have been sent to a separate ‘umpire’ laboratory since 2012.

In 2018, Silvercorp further improved their QA/QC protocols to include regular and more frequent submission of CRMs, coarse blanks, and field duplicates with drilling and underground samples. Coarse reject duplicates and pulp duplicates were also incorporated into drill sampling programs. The proportion of check samples sent to a different laboratory was also increased. In 2019, Silvercorp initiated real-time monitoring of QA/QC protocols.

The QP has reviewed QA/QC data collected to date. While some issues have been noted with data collected prior to 2014, all data collected thereafter shows reasonable analytical accuracy and precision. The QP does not consider issues noted with pre-2014 data to be a material concern and considers the Gaocheng sample database acceptable for Mineral Resource estimation.