Minerals and products are displayed during the Mineral Fest in Ljubljana, Slovenia, Sept. 19, 2026. (Photo by Zeljko Stevanic/Xinhua)
Quartz specimens are displayed during the Mineral Fest in Ljubljana, Slovenia, Sept. 19, 2026. (Photo by Zeljko Stevanic/Xinhua)
Visitors look at mineral specimen during the Mineral Fest in Ljubljana, Slovenia, Sept. 19, 2026. (Photo by Zeljko Stevanic/Xinhua)
