Minerals | By_Name | By_Class | Silicates | BENITOITE

BENITOITE Specimens



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# BEN-25, $110.00 Sold!
Dims: 2.12x1.04x0.66in (5.38x2.64x1.68cm) .... Wt: 0.64oz (18.0g) .... Loc: Benitoite Gem Mine, San Benito County, California, USA
Of the four benitoite specimens that adorn this specimen, only one is essentially complete, and that one is missing a small portion of one point, and much of the crystal is buried in the host rock (assuming that it is relatively complete - not at all assured). That crystal has one face with excellent vitreous luster, the others are somewhat dulled. It shows sufficient transparency to reveal internal reflections from well within the crystal. That crystal is crossed by several fractures.
# BEN-24, $35.00 Sold!
Dims: 2.4x2.0x0.5" (6.0x5.0x1.4cm) .... Wt: 1.10 oz. (31.1g) .... Loc: Benitoite Gem Mine, New Idria District, San Benito County, California, USA
This specimen has 4 benitoite crystals exceeding 1cm in length, and a dozen tiny ones. Some of the smallest have excellent form, but the larger crystals all are distorted and coated with some of the matrix from the "other" side of the cavity. There are two small neptunite crystals at one end with perfect form and color, but the interesting neptunite crystal appears weathered to a brown color, it attached to the largest of the benitoites, and the fractured surfaces at one end is a deep red and flashes intensely red from some angles when viewed with a loupe.
# BEN-23, $300.00 Sold! *A*
Dims:10.2x6.7x4.5" (25.9x17.0x11.4 cm) . . . .Wt: 100oz. (2.8kg) . . . .Loc:Dallas Gem Mine, San Benito cty., California
This is an incredible multiple-species specimen. At least two dozen partial or complete crystals of benitoite are scattered over this specimen. The largest crystal I found was just under 0.4" (1.0cm). Next, there are over 100 crystals of neptunite ranging in size from tiny to one monster 1.6" (4.1cm) in length. Many of these neptunites have excellent terminations. Finally, there is a small amount of tiny, acicular crystals of joaquinite on one edge of this specimen. These joaquinite crystals show a very dim yellow-brown fluorescence under short-wave ultraviolet light. All of these crystals are thrusting out of a bed of massive white natrolite. The natrolite is deposited on an altered serpentine host material. This is quite an impressive specimen.
# BEN-21, $180.00 Sold!
Dims: 0.9 x 0.6 x 0.4" (2.3 x 1.5 x 1.1 cm) .... Wt: 7 g .... Loc: Gem Mine, San Benito County, California, U.S.A.
This thumbnail piece consists of a single broken, incomplete Benitoite crystal. There is both fresh and old damage on the breakage surface of this crystal, which appears to be almost exactly 50% complete. What trigonal tabular form it has, however, is excellent, with well-defined edges and clean faces. Its color fades from colorless at its center to a deep blue at its edges, and its luster ranges from vitreous to pearly. It is transparent and dimly to moderately clear, and there is no host rock present. It glows brightly under a shortwave UV light source.
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