08342 - Beautiful 85.6 Inch Fibrous Black Arfvedsonite with Feldspar - Morocco Fezouata It does not have any
Yard notes & kiln story
Description
It does not have any type of restoration
Pribyl and Vanek 1985 (trilobite)
two uncommon Mosasaurs from the Upper Cretaceous of New Jersey
Impressive complete specimen
Pseudospyroceras
08342 - Beautiful 85.6 Inch Fibrous Black Arfvedsonite with Feldspar - Morocco Fezouata It does not have anyArfvedsonite is a sodium amphibole mineral with composition: [Na][Na2][(Fe2+)4Fe3+][(OH)2 Si8O22]. It crystallizes in the monoclinic prismatic crystal system and typically occurs as greenish black to bluish grey fibrous to radiating or stellate prisms. It is a rather rare mineral occurring in nepheline syenite intrusions and agpaitic (peralkaline) pegmatites and granites as the Golden Horn batholith in Okanogan County, Washington (type locality for