My Sediments Exactly @sedimentarymydear - Tumblr Blog

geopsum

These are the eras of our lives.

nevver

Kilauea

hematitehearts

Blocky group of Microline Crystals with Two Fluorite

Size: 3,5 x 4,5 x 3,0 cm

Locality: Farm Bergsig, Erongo Mountains, Erongo Region, Namibia

bijoux-et-mineraux

Sugilite - N'Chwaning III Mine, Kuruman, Northern Cape Province, South Africa

asapscience

Can any geologists confirm??

earthstory

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Taking samples from active lava flows, Hawaii

underthescopemineral

Polybasite-Tac, Chalcopyrite

[(Ag,Cu)6(Sb,As)2S7][Ag9CuS4], Cu1+Fe3+S2

Locality:

Clara Mine, Rankach valley, Oberwolfach, Wolfach, Black Forest, Baden-Württemberg, Germany

Field of View: 6.69 mm

Pseudohexagonal metallic black polybasite-tac crystals together with crystals of chalcopyrite with an indigo blue iridescence

Photo: Michael Förch

Polybasite-Tac’s old name is Antimonpearcite and is one of the four so-called “ruby silvers”. Polybasite and Pearceite are closely related minerals that form the pearceite-polybasite series. The mineral occurs in hydrothermal deposits formed at low to medium temperatures.

est-nord

underthescopemineral

Austinite

CaZnAsO4(OH)

Locality:

Christiana Mine, Kamariza Mines, Agios Konstantinos [St Constantine], Lavrion District Mines, Lavrion District, Attikí Prefecture, Greece

Field of View: 3 mm

Collection and photo Stephan Wolfsried

Austinite is a rare mineral in the oxidation zone of arsenic bearing base metal deposits, where it is found developed on the colloform (pertaining to the rounded, globular texture of mineral formed by colloidal precipitation) surface of limonite or lining small cavities. It is closely associated with adamite and appears to be a later mineral.

retropicool

earthstory

Timelapse view of lava moving on the plains near Pu’u O’o, Hawaii. The hill in the distance is called the “Pali”, it is the mark of a large normal fault created by part of the island sliding out towards the sea. Lava cascades over the Pali on its way to the ocean during the eruption. This is substantially sped up from how fast Pahoehoe lava typically flows.