Borealis is a Chessex plastic dice series with a glittering effect.
Probably based on das polarlight (Aurora)
|Maple Green with yellow||CHX 27565||green with yellow pips/numbers||
rumor: translucent green with a maple shimmer
|Red with White||LT610||red with white pips/numbers||
change of shimmer
Chessex has changed the shimmer of the dice over the years. The reason for this is that the powder was no longer available from the manufacturer.
Update: since spring 2016 they started to change. Source: Chessex.
The powder was banned in Germany because it is used for security features of banknotes.