Dallas Gem Mine, Diablo Range, San Benito Co., California, USA - A single terminated lustrous black neptunite crystal measuring 2.7 cm in length set on the side of matrix. No damage. Overall size: 3.5 x 2.5 x 2.5 cm.  Ex Ralph Merrill collection

SAN BENITO GEM MINE, SAN BENITO CO., CA, USA - There are various neptunites on this riolite specimen. The largest neptunite is a terminated crystal of 1.5 cm in size. There are others up to 0.5 cm. Overall size is 3x2.2x2 cm

SAN BENITO GEM MINE, SAN BENITO CO., CA, USA - This specimen hosts both the typical minerals from this locality. There is a terminated blue crystal of benitoite of 1 cm on the edge, well exposed on the riolite rock and some other partial benitoites. A couple of neptunite show on the back of the rock. Overall size is 3x2.5x2.5 cm.

SAN BENITO GEM MINE, CA, USA - Very nice specimen with a benitoite crystal of 1.2 cm, nicely terminated. This rocks shows also some other large partial crystals of benitoites and also some 1 cm neptunites ! overall size is 2.5x2x2 cm.

Bright, deep red, terminated 1.7 cm crystal of neptunite on matrix. There are 2 other smaller crystals on the right. Showy 3x3x2 cm specimen. Overall size is 3x3x2 cm.