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Derriksite

Named for Jean Marie Francois Joseph Derriks, a Belgian mineralogist who studied the uranium deposit at Shinkolobwe in the Democratic Republic of the Congo. This is the same country where Derriksite finds its type and only locality at the Musonoi mine at Kolwezi in the Katanga Copper Crescent. It occurs there in the oxidized selenium-bearing copper-cobalt deposit. Associated minerals include selenian digenite, chalcomenite, demesmaekerite, and malachite. Derriksite is quite radioactive.

Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/derriksite.pdf

Desautelsite

Paul Ernest Desautels is the namesake of this mineral as the former Curator of Mineralogy at the National Museum of Natural History in the Smithsonian Institution in Washington D.C., USA. Desautelsite is a rare mineral that occurs only in the United States in localities in California, Maryland, and Pennsylvania, and in Japan at Kohnomori in Kochi City on Shikoku Island. It occurs as an abundant mineral in fractures in serpentinite breccias with other secondary magnesium minerals in its California localities, and in ultramafic rocks in faults through sediments in Japan.

Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/desautelsite.pdf

Descloizite

Named after Alfred Lewis Oliver Legrand Des Cloizeaux (1817-1897), a Professor of Mineralogy at the University of Paris in France who was the first to describe the mineral. Occurs widespread in the oxidation zone of hydrothermal ore deposits rich in lead and zinc. Crystals often as flaming orange red drusy crusts and micro thin platy crystals. Can occur in beautiful dark chocolate plumose aggregates with dipyramidal crystals in the centimeter range.

Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at
http://www.handbookofmineralogy.org/pdfs/descloizite.pdf

Devilline

Named for Henri Etienne Sainte-Claire Deville, who was a French chemist of the 1800’s whose most important work was in inorganic and thermal chemistry and had many experiments in the artificial preparation of minerals. Devilline is an uncommon mineral that occurs in localities in England, Slovakia, Germany, Italy, Namibia, Japan, New Zealand, the United States and many others. It forms as a secondary mineral in oxidized copper sulfide deposits and can be found of post-mine origin in dumps and on timbers. Devilline is soluble in water.

Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/devilline.pdf

Devitoite

Named to honor Alfred Devito who was a prominent mineral collector of micromounts in particular and a field collector and contributor to the mineralogical community of California in the United States. Devitoite is a rare mineral that can be found only at its type locality in the Esquire No. 8 claim in the Big Creek-Rush Creek district of California, USA. There, it occurs as “an alteration product of gillespite along fractures and parting planes in a sanbornite-bearing rock.”

Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/devitoite.pdf

Dewindtite

Named to honor Belgian geologist Dr. Jean Dewindt. A rare secondary mineral that occurs via the alteration of uraninite or earlier-formed uranium minerals. Localities for Dewindtite are found in the Democratic Republic of the Congo, Germany, France, the Czech Republic, Portugal, Canada, and Australia, among several others. Dewindtite is highly radioactive, and will fluoresce green under ultraviolet light.

Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/dewindtite.pdf

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