Home > Laskowski Ⅴ – July 20 > MS1907 Lavendulan


Lavendulan is a hydrous sodium calcium copper arsenate chloride. Breithaupt (1837) named an amorphous mineral for its color like flowers of Lavandula spica. The 6th edition of Dana's System of Mineralogy (1892) describes lavendulan as an amorphous material from Annaberg, Germany. For a chemically similar mineral from Chile, Goldsmith (1877) applied the name lavendulan to a crystallized blue mineral. In the 1951 Dana's System of Mineralogy, lavendulan appears twice for both Breithaupt's and Goldsmith's materials. The modern definition of lavendulan is based on X-ray diffraction work by Guillemin (1956), who regarded lavendulan as an arsenate mineral isomorphous with sampleite. Both Ondruš et al. (2006) and Giester et al. (2007) agree that lavendulan is isomorphous with sampleite, and give the modern formula for the species.

Lavendulan forms blue plates to 0.5 mm on gossan matrix. This locality is the type locality for three mineral species (not present on this specimen). From the collection of E.R. Laskowski (1949-2020), a mining engineer who retired to Tucson, Arizona.

Price: $45

Item code: MS1907

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