MINERAL SPECIMEN OF PURPLE, CRYSTALLINE DUMORTIERITE SAN DIEGO CO., CA

Description

THIS IS A MINERAL SPECIMEN OF
PURPLE, CRYSTALLINE DUMORTIERITE WITH QUARTZ MATRIX.
THE SPECIMEN IS
APPROXIMATELY 7 X 7 X 3 cm
.  IT
WEIGHS 158.9 gm.
THE SPECIMEN IS FROM
DEHESA, SAN DIEGO CO., CALIFORNIA
. THE SPECIMEN WAS COLLECTED IN 1960.  DUMORTIERITE IS RARELY FOUND CRYSTALLIZED.  THESE CRYSTALS ARE IN NEEDLE LIKE PARALLEL AND COMPACT SPRAYS.  IT IS AN ATTRACTIVE EXAMPLE.  DUMORTIERITE WAS USED TO MAKE THE PORCELAIN INSULATORS ON SPARK PLUGS.  SEE PICTURES.  I WILL COMBINE SHIPPING WHEN POSSIBLE.  THANKS FOR LOOKING.