Riebeckite
Riebeckite phenocrysts in rhyolitic matrix
Origin: near Alamo, Lincoln Co., Nevada, USA
Sample size: 3 x 2 x 1 cm, crystals 1 mm
Origin: Franklin, New Jersey, U.S.A.
Sample size: 6 x 4 x 12.5 cm
A vein of "crocidolite" fibrous bluish riebeckite, 2 cm in thickness
Origin: Wittenoom (Wittenoom Gorge), Pilbara, Western Australia, Australia
Sample size: 8.3 x 5.1 x 4.4 cm
Blue 5-10 mm riebeckite crystals in granite matrix; from several localites in
the Porto Area
Origin: Porto area, Corsica, France
Sample size: 5 x 6 cm
Blue-black crystals in seyenite
Origin: Ivanpah Mts., near Mescal Springs, San Bernardino Co., California,
U.S.A.
Ex. Paul F. Patchik collection
Sample size: 6x10 cm
Origin: Serpentine Hill, Tasmania, Australia
Sample size: unknown
Sample owner: Steve Sorrell