Patches colourless pabstite indistinguishable from matrix, however bright blue
fluorescent
Really a nondescript mineral with clear to white anhedral grains in
recrystallized siliceous limestone. It's easy to detect where in the matrix
the pabstite occurs as it is strongly fluorescent, light blue. This specimens
is fairly rich and is associated with
tremolite.
Fluorescent blue grains of clear to white pabstite to 3mm hard to distinguish
from the
tremolite/actinolite
matrix.
Stibnite association. Ex. Kidwell collection
Origin: Kal-Kar quarry, Santa Cruz Co., California, U.S.A. (type locality)
Sample size: 5 x 3 x 3 cm (top), 7 x 6 x 4 cm (2nd row), 5 x 4 x 3 cm
(3rd row), 4.5 x 4 x 3.5 cm
(bottom)
Nondescript white crystal to 5-6 mm in matrix. You cannot really discern the
crystal until you place an ultraviolet light under short wave on the
specimen. The right photo shows a strong response to UV SW, a typical bright
blue.
Origin: Pacific Limestone Products quarry (Kalkar quarry), Santa Cruz Co.,
California, United States
Sample size: 4.5 x 4 x 2.5 cm
Photo courtesy of:
