this is chrome tourmaline-under daylight a deep green color, under incandecent light w/chelsea filter, a deep red color-in the case of these stones-a little extreme-one can see the red color without the filter-a large amount of chrome within the material will account for the extreme change of color in this case-these stones under incandecent light w/filter are deep red in color-steve...iv seen green tourmaline referred to as chrome tourmaline because chrome green color is implied in the description of the stone...attached is a pic thru the filter under incan. light...
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