These three crystals captured in Colombian rock crystal quartz host three crystal morphologies of the rare mineral parisite: bipyramidal, hexagonal tabular prism, and pyramidal forms. Photomicrograph ...

“Visions in Crystal” stands at more than 6 feet (210 cm) tall and is comprised of 264 tiles of rock crystal quartz, citrine and smoky quartz each cut with various angular facets, each measuring 60 x ...

Archaeologists working in another separate stretch of western England found similar artefacts revealing much about the country's Neolithic past in the form of a series of "rare rock crystals".