Hohe Liet, Warstein, Soest, Arnsberg, North Rhine-Westphalia, Germany
Brownish calcite crystals from Hohe Liet. Sample width: 6 cm.
© Andreas Gerstenberg
Köster - Risse quarries, Hohe Liet, Warstein, Soest, Arnsberg, North Rhine-Westphalia, Germany
Archaea Bacteria In Eisenkiesel Psm Fossil Stromatolite colored by Limonite Personal collection Jonas Thiel
© Jonas Thiel
Green acicular Malachite crystals on orange (iron-stained?) Quartz crystals
© mindat.org
Quartz crystals with yellowish to light brownish inclusions of Goethite/Limonite discussed to be caused by archea bacteria. Other authors described them as fungi mycelia (most likely: order mucorales, oligocene-miocene). Early 1980s specimen.
© Stefan Koch
Green acicular Malachite crystals associated with brownish scalenohedral Calcite crystals on greyish Quartz
Malachite crystals green , p.w. 2.91 mm , Coll. Jacques Peters , Photo Ko Jansen.
© Ko Jansen
Quartz var. Eisenkiesel with Limonite after fungi inclusion & Hematite
© Hercule Shen
Quartz with inclusions of yellow limonite and small hematite blades
© Heyninck A
Cut and polished specimen of gray Devonian limestone ("Massenkalk") with numerous black authigenic quartzes that are losely associated with calcite-quartz veinlets. It seems as if the crystal growth was triggered by changes in the chemistry of the rock after solutions entered the rock through the veins. The cross sections of the quartz crystals ...
© Amir Akhavan
Calcite xx, malachite xx and quartz xx from Hohe Liet, Warstein.
A group of double-terminated "Suttrop quartz" crystals, etched out of the calcite-clay filling of a karst cavity. The group is held together by some remaining calcite matrix, visible in the center. These hydrothermally grown crystals can be found accumulated in karst hollows filled with sediment. They may occur as individual crystals or randomly ...
Polished section of a calcified sediment from a karst hollow in Devonian limestone ("Massenkalk"). It contains numerous centimeter-sized double-terminated milky quartz crystals ("Suttroper Quarze"). The crystals contain anhydrite/gypsum inclusions and are fractured, probably due to mechanical stress from the surrounding matrix. These crystals are ...
White, milky, short-prismatic and in part double-terminated quartz crystals from a vertical vein in Devonian limestone ("Massenkalk") in the northern part of the quarry. Width of the specimen 68 mm.
Mineral search with use of pneumatic hammer to a hydrothermal vein (devonian Limestones)
© 2009 HGG
use of Pessluft search for minerals (devonian Limestones)
View into the "Risse" quarry (devonian Limestones)