Minerals | By_Name | By_Class | Silicates | Astrophyllite

Astrophyllite Specimens



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# AST-13, $25.00 Sold!
Dims: 2.97x1.39x0.57" (7.55x3.52x1.44cm) .... Wt: 0.76oz (21.6g) .... Loc: Khibiny, Russia
This specimen is largely astrophyllite, although there is a significant amount of quartz present. The specimen has been polished to a high gloss on one side, which appears black with gold and red highlights reminescent of some opals I've seen. The back of the specimen is rough, with black and gold crystals in the quartz matrix. A loupe reveals that the astrophyllite crystals have an appealing irridescent pattern of golds, oranges, and reds, and also that the black mineral must be more astrophyllite that has weathered to a black which is irridescent in shades of very dark green and blue. The orange crystals appear translucent in thin sections.
# AST-12, $45.00 Sold!
Dims: 2.63x2.15x1.68" (6.68x5.46x4.26cm) .... Wt: 6.68oz (189g) .... Loc: Khibiny, Russia
This astrophyllite specimen is composed of several radial clusters that look as though they formed from a half-dozen attachment points on the sides of a cavity, a spread into the center. They (along with other minerals including quartz and albite) filled the cavity. The largest clusters of astrophyllite are quite nice, with long gold and black crystals having a vitreous luster and a surface texture showing many fine layers due to a fracture pattern.
# AST-11, $69.00 Sold!
Dims: 3.81x2.86x1.52" (9.67x7.26x3.86cm) .... Wt: 9.41oz (266.2g) .... Loc: Khibiny, Russia
This astrophyllite hand specimen boasts three large sprays of the crystals on an impure calcite host. The largest crystal measures 40mm long and 4mm wide, and the clean crystals on the front of the piece have a good vitreous luster and brassy color. Examination with a loupe shows that the color picture is much more complex - each crystal is a montage of colored segments, all different shades of gold, brass, copper, or brown, put together like a stained glass window. Very pretty, and too bad that a loupe is needed to appreciate this. Where the rock is broken away, the three-dimensional nature of the crystal sprays is visible (at first glance, it looks like the crystals are all flat against the specimen). And a close examination reveals a half-dozen additional clusters, although these tend to be small and weathered (with a dull luster).
# AST-10, $60.00 Sold!
Dims:4.0x3.4x1.1" (10.1x8.6x2.8 cm) . . . .Wt: 9.6oz. (271g) . . . .Loc:Khibiny Massif, Kola Peninsula, Russia
Excellent radial sprays of astrophyllite are found in this specimen. The astrophyllite crystals permeate the entire matrix. The matrix consists of quartz, with some plagioclase, biotite, and amphibole present. Without access to thin section examination, I would call this a granodiorite. The astrophyllite blades reach 1.1" (2.8cm) in length and are golden-brown in color.
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Minerals | By_Name | By_Class | Silicates | Astrophyllite

 

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