Linarite Value, Price, and Jewelry Information


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

The blue color of linarite is magnificent, and it is a pity that large facetable rough has not been found. Clean areas of crystals are usually very small, and breakage in cutting due to the softness and cleavage of the mineral further complicates the salvaging of a large gem. This is a lovely collector item and an extremely rare one.

Linarite Value

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Linarite Information

DataValue
NameLinarite
Crystallography Monoclinic. Crystals prismatic; also in druses and crusts.
Colors Dark azure blue.
Luster Vitreous to subadamantine.
Fracture Conchoidal; brittle.
Hardness 2.5.
Specific Gravity 5.30.
Birefringence 0.050.
Cleavage Perfect 1 direction.
Stone SizesFaceted gems over 1 carat are very rare. Anything over ½ carat is remarkably large for linarite. Crystals tend to be filled with fractures or are translucent and are usually very thin blades on rock. Grand Reef material has yielded cut gems in the 2-carat range.
Luminescence None.
Spectral Not diagnostic.
FormulaPbCu(SO4)(OH)2.
Pleochroism Pale blue/medium blue/Prussian blue.

Streak: Pale blue.

Optics:  a = 1.809; β= 1.838, γ= 1.859.

Biaxial (-), 2V= 80°.

Occurrence: Secondary mineral in the oxidized zones of lead-copper deposits.

Blanchard Mine, Socorro County, New Mexico: California: Montana: Utah: Idaho: Nevada.

England: Scotland; Spain: Germany: Sardinia: USSR: Canada: Argentina: Pe/ u: Chile: Japan: Australia: Tsumeb, Namibia.

Mammoth Mine, Tiger, Arizona: large crystals of fine color.

Grand Reef, Arizona: large crystals, some cuttable.

Comments: The blue color of linarite is magnificent, and it is a pity that large facetable rough has not been found. Clean areas of crystals are usually very small, and breakage in cutting due to the softness and cleavage of the mineral further complicates the salvaging of a large gem. This is a lovely collector item and an extremely rare one.

Name: After the locality, Linares, Spain.