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Mineralpedia Details for Lavendulan

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Lavendulan

Lavendulan

The name of Lavendulan was recently discovered to be a misnomer after the lavender color of the “type” specimen, which was later discovered to be a mixture and of no relation to the modern Lavendulan which has not been found to exhibit a lavender color. Lavendulan is an uncommon mineral in oxidized copper deposits and can be found in Germany, England, the Czech Republic, Scotland, France, Spain, Tunisia, Iran, Namibia, Morocco, Chile, Australia, and the United States.

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

Formula
NaCaCu5(AsO4)4Cl·5H2
Crystal System
Orthorhombic 
Crystal Habit
Botryoidal, Encrustations 
Cleavage
Perfect, Indistinct, None 
Luster
Vitreous - Waxy 
Color
blue, lavender blue, greenish blue 
Streak
light blue 
Class
Orthorhombic 
Fracture
Brittle - Uneven 
Hardness
2.5 
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Lavendulan from Ashburton Downs, Western Australia, Australia

Lavendulan
            from Ashburton Downs, Western Australia, Australia

Bright blue powdery coatings with good coverage. Very little of this material was found occurding to the 1993 MR issue (v. 24) by Ernie Nickel and Blair Gartrell.

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Lavendulan from Pentire Glaze mine, St Minver, Cornwall, England

Lavendulan
            from Pentire Glaze mine, St Minver, Cornwall, England

Bright blue micro Lavendulan crystals covering face with minor Olivenite.

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Lavendulan from Svornost mine, Jáchymov, Erzgebirge, Bohemia, Czech Republic

Lavendulan
            from Svornost mine, Jáchymov, Erzgebirge, Bohemia, Czech Republic

Bright sky-blue microcrystalline encrustation of Lavendulan on both sides of matrix.

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Lavendulan from Meskani mine, Anarak dist., Esfahan Province, Iran

Lavendulan
            from Meskani mine, Anarak dist., Esfahan Province, Iran

Bright sky blue coating composed of tiny spherulitic crystals on front and backside.

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Lavendulan from Emma Luisa mine, Guanaco, Antofagasta, Chile

Lavendulan
            from Emma Luisa mine, Guanaco, Antofagasta, Chile

Clusters to 6mm across.

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Lavendulan from Abundancia mine, Guanaco, Santa Catalina, Antofagasta, Chile

Lavendulan
            from Abundancia mine, Guanaco, Santa Catalina, Antofagasta, Chile

Electric blue flat crystals to 2mm on face with minor Olivenite.

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Lavendulan from San Rafael mine, Nye Co., Nevada, United States

Lavendulan
            from San Rafael mine, Nye Co., Nevada, United States

Vivid or electric blue fantastic platy crystals in sprays of Lavendulan to 0.5mm.

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Lavendulan from La Reconquistada claim, Pastrana, Mazarrón, Murcia, Spain

Lavendulan
            from La Reconquistada claim, Pastrana, Mazarrón, Murcia, Spain

Flashy, electric blue Lavendulan radiating plates of Lavendulan to 3mm across with beads of green Cornwallite. A great arsenate locality in Spain.

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