Thursday, April 14, 2011
Usually marketed as "Norwegian Pearl granite." In some marketplaces, the lighter variety is
called " Norwegian moonstone" and the darker variety as "Royal blue pearl granite" or "Emerald pearl ..." also spelled laurvikite. Without direct light the stone looks grey and black, just beautiful.
Larvikite is a light to dark gray coarse grained feldspar-rich grock that exhibits light blue "flashlike reflections" on some surfaces; the reflections, which come from individual anorthoclase grains that exhibit a chatoyant-like appearance, are frequently referred to as a pearl-gray iridescence, opalescence, or even
labradorescence (in allusion to the appearance of labradorite).
Larvikite has many trade names: Birds eye granite, Black moonstone, Blue Norwegianmoonstone, Blue pearl granite, Blue granite, Blue antique, Blue pearl, Bluepearl fjord, Emerald pearl, "Labradorite," Larvik granite, Marina blue star, Norwegian pearl granite, Norwegian moonstone and Royal blue pearl granite are
those I have seen. As is apparent, some of these name are unfortunate misnomers, particularly from the stand point that terms like granite are included; certainly larvikite is not a granite in the laguage of petrography
and it is hardly such in the usual sense of the word as used in the building/monument stone industry.