Boleite Value, Price, and Jewelry Information


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

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 Value

The International Gem Society (IGS) has a list of businesses offering gemstone appraisal services.

Boleite Information

DataValue
NameBoleite
Crystallography Tetragonal. Pseudocubic. Crystals usually cube shaped, sometimes modified by other faces, and in parallel growths.
Colors Indigo blue to Prussian blue, blackish blue.
Luster Vitreous, pearly on cleavage.
Hardness 3-3.5
Specific Gravity 5.05
Birefringence 0.020
Cleavage Perfect 1 direction, good 1 direction.
Stone SizesCrystals up to 2 cm on an edge have been found. Crystals, however, are usually nearly opaque, and facetable material is exceedingly rare. Stones up to about 1 carat have been cut, and even these are not entirely clean.
Luminescence None
Spectral Not diagnostic.
FormulaPb9Ag3Cu8Cl21(OH)16·H2O
Pleochroism None

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.