In 1955, the Aurora Borealis, a coating applied to crystal stones to produce a "rainbow of colors" effect was introduced.
Aurora Borealis crystals have 26 facets.
( z1 have :ARG0 ( z2 crystal :name ( z3 name :op "Aurora" :op "Borealis" ) ) :ARG1 ( z4 facet :quant 26 ) )