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rockon-ro: VANADINITE (Lead Chlorovanadate) crystals from the classic location Mibladene, Midelt, Morocco. Geology Nerd
Blue phenocryst has well developed oscillatory growth zoning with some zonesshowing inclusions. Both crystals show sector zoning. Mineral crystals blasted out from volcanoes can provide a window into the powerful processes going on inside those volcanoes, say UK and German … Continue reading
ggeology: Azurite crystals with Malachite on matrix //?United Verde Extension Mine, Arizona, USA Geology Nerd
zafojones: Strengite crystals (FePO4 ? 2H2O) are typically prismatic and can be aggregate like the one shown. Geology Nerd
libutron: Epidote Crystals on Hematinic Quartz Cluster | ?Hummingbird Minerals Hongxi, Meigu County, Sichuan Province, China. Geology Nerd
Scanning electron microscope picture of a zircon crystal from the Sudbury crater. New research suggests that the very oldest pieces of rock on Earth — zircon crystals — are likely to have formed in the craters left by violent asteroid … Continue reading
The tiny crystals probably formed in huge impact craters not long after Earth formed, some 4 billion years ago read more (e) Science News – Paleontology & Archaeology
mineralists: Sharp crystals of blackjack Sphalerite set atop Golden Fluorite. Very unique! Minerva #1 Mine, Illinois. Geology Nerd
Naica Mine,Mexico Gypsum is a naturally occurring mineral which is often used in industrial processes and which in nature, if left alone for thousands of years, can grow into huge translucent, towering and eerie, crystals more than 10 metres tall. … Continue reading
mineralists: Amethyst crystals on matrixGoboboseb Mts, Namibia Geology Nerd