Limon drilling to start in known high-grade areas

• Sunstone to commence pivotal new drilling program next week at the Limon epithermal gold-silver discovery; Limon already hosts a substantial Exploration Target (see below) • Drilling will target areas where recent trenching has returned a host of high-grade assays, including; o 14.95m at 4.8g/t gold, including 6.2m at 10.7g/t gold (trench LM-05c)1 o 3.9m at 8.4g/t gold, including 1.9m at 16.2g/t