Large cluster of ancient quartz, collector's specimen, 2 kg

Very beautiful old collector's specimen, quartz cluster, rock crystal. The points are not perfectly crystalline, deposit of limonite and yellow sand visible especially on the base, as well as white deposit between certain points. Unknown provenance. 28-29 cm max length, 12 cm max width approximately, max height 10.5 cm. Good general condition, some broken or damaged points, overall a little tarnished. It is nonetheless a nice collector's or lithotherapy piece. Between 1.9 kg and 2 kg.