Hedenbergite quartz points, small
Hedenbergite quartz points, small
Locale: HuangGangLiang mining district, Inner Mongolia, China
Approx point length and weight: A 2", 16g B 2", 13g C 1.5, 10g
These quartz points are from HuangGangLiang, and commonly called Mongolian or Inner Mongolian quartz. When the primary inclusion is hedenbergite, enough to give the quartz a greenish tint, it is more appropriately called hedenbergite quartz.
This isn't your typically shiny quartz crystal; the points have a matte luster with a sheen effect, producing a ghostly appearance. Broken ends reveal the first generation of growth was an icy clear colorless quartz. A second generation of growth occurred, depositing a layer of cloudy hedenbergite-included quartz. Hedenbergite is often green-to-olive-brown in color, and gives the quartz a dull green-ish gray hue. Some hedenbergite quartz like options A and C produce an odd grainy effect just under the surface at the tip. Inclusions make the point near-opaque.
Points A and C are sprinkled with whitish rice-like quartz crystals, and imprints from small crystals that have dissolved. All have some sprouting growth, with B displaying the best. A and B are also accompanied by a dark mineral similar to schorl (black tourmaline) in appearance. While schorl can commonly accompany quartz, I'm not sure that would apply to this locale.
The small dark spheres included inside the crystal and dotting the surface may be goethite or hedenbergite, but on other specimens they have a near-metallic luster resembling pyrite. The spots also may simply be iron or chlorite!
The background model in the first image is a Silver squill, ledebouria socialis var. violacea.