Detailed sheet

boleite

It is named after its place of discovery: Boleo, Baja California, Mexico.
It was identified by Mallard and Cumenge in 1897.



CHEMICAL CHARACTERISTICS

KPb26Ag9Cu24(OH)48Cl62

complex halide mineral



PHYSICAL CHARACTERISTICS

Main color

blue

light blue to indigo

Color of streak

blue

Luster

pearly, vitreous

Hardness

3.0 to 3.5

Density

4.80 to 5.20

Cleavage

perfect

Fracture

uneven

easy cleavage only in one direction, fracture with very small flat surfaces



OPTICAL PROPERTIES

Transparency

translucent, transparent

Refractive index

1.970 - 2.050

Double refraction

0.000

zero birefringence, isotropic

visible double refraction

No

Dispersion

très faible(-)

Pleochroism

absent

Number of colors

1

Fluorescence

none



CRYSTALS PROPERTIES

well shaped cubic crystals with or without truncation

crystals system

cubic



OTHER INFORMATIONS

Exploited
sites

It is found in England (Cornwall), Germany (Saxony), United States (Arizona) at Boleo in Mexico where she was discovered and France (Cap Garonne Mine, Var).

use in jewelry

rare collection stone, faceted

Other
Gems

Venez visitez

notre site web

voillot-joaillier.fr

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