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rose quartz sample sioux quartzite samples prairie agate samples gold ore sample mica sample bottle of gold miners helmet strip-mining is the process of reaching a specific layer of rock and minerals by removing all the layers above the target layer. this technique is used when a mineral can be found at a specificquartz helicopter mine, custer mining district, custer Co south dakota, usa. polished sphere of rose quartz fashioned from material collected at the helicopter mine in 1998 or 1999. In strong light the sphere shows a faint chatoyant star. To find out environmental impacts of mining rose quartz, star rose quartzs and rough stones were studied and tested with the help of gemological microscope, ftir, uv-vis spectra, epma, icp-ms