{"product_id":"blind-eye-fluorite-faceted-gems","title":"Blind Eye Fluorite Faceted Gems","description":"\u003cp\u003eThese are loose calibrated faceted stones of lab fluorite, \u003cspan style=\"font-size: 0.875rem;\"\u003ecut with the opaque crystal edges at the culet in order to give a 'blind eye' effect.  These were grown for optics - fluorite has the lowest RI and dispersion of of any gem which means minimal chromatic aberration.  Since they're for use in optics, they do not have any fluorescence.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eYou might be wondering \"why are fluorite gems is so rare when it's so cool?\" That's because fluorite is a really tricky material to cut.  It has low Moh's hardness (rank 4 on the scale), and on top of that has four perfect cleavage planes - it wants to break into perfect octahedrons.  Therefore, it requires extreme care when cutting or setting - any mistake, and the gem can split in half.\u003c\/p\u003e","brand":"Turtle's 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