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

Benitoite Gem Mine, San Benito County, California, USA - This mineral is among the rarest and unique ! Jonesite occurs only at this mine where Benitoite occurs. Unfortunately, now, the mine is closed for good. No way to get more material ! This specimen hosts various small, well exposed cluster of jonesite crystals close to 1 mm in size, more than large for this species ! close to them there are also some partial neptunite and benitoite crystals and some tiny joaquinite crystals, orange in color. Overall size is 12x7x5 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.