(40/47)  The plagioclase twins are only found when the 10x magnifying glass is used. Already with this one look it is clear that this cannot be a Larvikit. Furthermore, in East Germany („Lausitz“), where this erratic boulder comes from, Rhomb Porphyry is almost never found. However, they are much more common as boulders than Larvikite, which means that if Rhombporphyry is missing, there are no other boulders from Norway.