What gemstones are mined in Slovakia?

In Slovakia, notable gemstones include opal, agate, and jasper, which are primarily found in the country's volcanic and sedimentary rock formations. Additionally, Slovakia is known for its deposits of quartz, particularly amethyst and smoky quartz. While not as widely recognized for gemstone mining compared to other countries, Slovakia's geological diversity provides a variety of semi-precious stones. The mining of these gemstones is often small-scale and contributes to the local craft and jewelry industries.