green fluorite crystals from the rogerley mine uk on white background

green fluorite crystals rogerley mine uk white background brilliant translucent quartz precious fluoritequartz amethyst naturaltherapy crystalhealing gemstone geological gemstones semiprecious nature calcium britain weardale emerald fluorescent fluoride pegmatite hydrothermal stone sample ore cubic glass england gemmy glassy fluorine mineral cube treasure specimen rock aggregate transparent gem matrix geology mineralogy isolated crystalline crystal cluster great