• Chemistry: CuPb2Cl2(OH)4, Hydrated Copper Lead Chloride Hydroxide.
  • Class: Halides
  • Uses: A very minor ore of copper and lead and as mineral specimens.
  • Specimens

Diaboleite's name could be interpreted from Greek as the "different" boleite. Not to be confused with the "false" boleite; named pseudoboleite. All three minerals have similar color and chemistries although boleite's is more complex and includes silver (Pb26Cu24Ag10Cl62(OH) 48 - 3H2O). Boleite was named for Boleo, Santa Rosalia, Baja California, Mexico. Diaboleite is only known from Mendip Hills, Somerset, England and a couple of localities in Arizona.

These three minerals and others with similar chemistries belong to a division in the Halides Class called the Oxyhalides and Hydroxyhalides. These minerals have oxygen and/or hydroxide groups in their respective formulas. The oxygen atom in the formula might require classification in the Oxides Class of minerals except that the structures are more tied to the halide elements and the oxygens and hydroxides are kind of superfluous to the overall structure. Some other members of the Oxyhalides and Hydroxyhalides include bideauxite, chloroxiphite, kelyanite, blixite, botallackite, laurionite, paralaurionite, mendipite, fiedlerite, pinchite, penfieldite, yedlinite, atacamite, koenenite, cumengite, zirklerite and paratacamite. Of these, only atacamite and boleite are common enough to be seen at rock shows and in rock shops with regularity.


  • Color is sky blue to dark blue.
  • Luster is adamantine.
  • Transparency: Crystals are usually translucent to transparent.
  • Crystal System is tetragonal; bar 4 2/m
  • Crystal Habits include granular crystals and encrustations.
  • Cleavage is perfect.
  • Fracture is conchoidal.
  • Hardness is 2.5
  • Specific Gravity is 5.4 - 5.5 (very heavy for translucent minerals)
  • Streak is blue.
  • Associated Minerals include other copper and lead minerals such as boleite, linarite, anglesite, wulfenite, phosgenite and cerussite.
  • Notable Occurrences are limited to the Mammoth-St. Anthony and Rowley Mines of Arizona, USA and the type locality of Higher Pitts Mine, Mendip Hills, Somerset, England.
  • Best Field Indicators are color, density, fracture, streak and locality.
DIABOLEITE specimens:
(hover for more info)
DIABOLEITE specimen dbl-1
$ 60.00
Dims:1.1x0.8x0.5" (2.8x2.0x1.3 cm)
Wt: 0.4oz. (12g)
Mammoth-St Anthony Mine, Tiger, Arizona
This specimen consists of a single diaboleite crystal (0.3x0.3", 0.8x0.8cm) lying on a matrix of massive and semi-crystalline diaboleite. A tiny amout of host material is present. Although a bit crude, one can identify the tetragonal form of this crystal. There is a minor amount of damage to the left face of this crystal.
no photo
dbl-1 ($ 60.00)
Mammoth-St Anthony Mine, Tiger, Arizona
DIABOLEITE specimen dbl-2
$ 100.00
Dims:0.8x0.6x0.5" (2.0x1.5x1.3 cm)
Wt: 0.2oz. (5g)
Mammoth-St Anthony Mine, Tiger, Pinal cty., Arizona
On a tiny bit of matrix material, crystals of deep azure-blue diaboleite grow to 0.2" (0.5cm). These crystals are intergrown with crystals of hydrocerussite. Some of the hydrocerussite crystals are stained dark brown by iron. One side of the specimen has been cleaved (both minerals). This is the only visible damage to this piece.
no photo
dbl-2 ($100.00)
Mammoth-St Anthony Mine, Tiger, Pinal cty., Arizona


Copyright ©1995-2023 by Amethyst Galleries, Inc.