Dims: 3.2 x 3.1 x 2.1" (8.0 x 7.9 x 5.2 cm)
Wt: 7.9 oz. (224 g)
Weldborough Quarry, North East Tasmania, Australia
A few hollow vesicles in the basalt host of this cabinet specimen are lined with small, fine Natrolite needles. These needles do not generally exceed 0.1" (3 mm) in length and are in excellent condition. Though too fine to study without high magnification, they likely have excellent orthorhombic form. All are colorless and transparent as individuals, and show a vitreous luster. Some of the other hollows in the host rock are lined with tiny quartz druses, and others are completely filled with apparently massive analcime.