Boleite Value, Price, and Jewelry Information

Rob Lavinsky, iRocks.com – CC-BY-SA-3.0 [CC-BY-SA-3.0], via Wikimedia Commons

Boleite

Cut boleite is strictly for collectors, since it is soft and very rare. Faceted gems of any transparency should be considered among the rarest of all gemstones. The color is so attractive that any available stones would be quickly snapped up by collectors.

Boleite Information

Data Value
Name Boleite
Crystallography Tetragonal. Pseudocubic. Crystals usually cube shaped, sometimes modified by other faces, and in parallel growths.
Refractive Index 2.03-2.05
Colors Indigo blue to Prussian blue, blackish blue.
Luster Vitreous, pearly on cleavage.
Hardness 3-3.5
Fracture Uneven
Specific Gravity 5.05
Birefringence 0.020
Cleavage Perfect 1 direction, good 1 direction
Luminescence None.
Luminescence Present No
Transparency Transparent to opaque.
Absorption Spectrum Not diagnostic.
Formula Pb9Ag3Cu8Cl21(OH)16 · H2O
Pleochroism None.
Optics o = 2.05; e = 2.03. Uniaxial (-).
Optic Sign Uniaxial -
Etymology Named after the type locality, Boleo, Santa Rosalia, Baja California, Mexico.
Occurrence Secondary mineral in Cu and Pb deposits.

OPTICS: o = 2.05; e = 2.03

Uniaxial (-)

OCCURRENCE:  Secondary mineral in Cu and Pb deposits.

Chile; Broken Hill, N.S.W., Australia

Boleo, Baja California: magnificent single crystals and groups on matrix, with single crystals up to nearly ½ inch.

COMMENTS: Cut boleite is strictly for collectors, since it is soft and very rare. Faceted gems of any transparency should be considered among the rarest of all gemstones. The color is so attractive that any available stones would be quickly snapped up by collectors.

NAME: Boleo, Santa Rosalia, Baja California, Mexico.

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