Bayldonite Value, Price, and Jewelry Information

Bayldonite
By Tony Hisgett from Birmingham, UK (BayldoniteUploaded by tm) [CC-BY-2.0], via Wikimedia Commons

Bayldonite is a nondescript greenish material that has been cut into cabochons by enterprising collectors of the unusual. Cut bayldonites are a rarity, nonetheless, and are seldom seen in collections. The luster of cabochons is sometimes almost metallic and provides a curious appearance to the cut stones. Bayldonite provides a curious appearance to the cut stones. Bayldonite is compact but too soft for rings; it could be worm in bola ties and pendants.

Bayldonite Value

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Bayldonite Information

DataValue
NameBayldonite
Crystallography Monoclinic. Fibrous concretions; massive, granular.
Refractive Index 1.95-1.99
Colors Various shades of yellowish green.
Luster Resinous. Cabochons may appear almost metallic.
Fracture Conchoidal to irregular
Hardness 4.5
Specific Gravity 5.5
Birefringence 0.004
Cleavage Not observed
Dispersion No data.
Stone SizesCabochons only for massive, fibrous material from Tsumeb.
Luminescence None
Transparency Translucent to transparent.
Absorption Spectrum Not diagnostic.
Formula(Pb, Cu)3 (AsO4)2(OH)2
Pleochroism No data.
Optics α = 1.95; β = 1.97 γ = 1.99. Biaxial (+), 2V large.

OPTICS: α = 1.95; β = 1.97 γ = 1.99

Biaxial (+), 2V large

OCCURRENCE: Secondary mineral in Pb-Cu deposits.

England; France.

Tsumeb, Namibia: only major occurrence

COMMENTS: Bayldonite is a nondescript greenish material that has been cut into cabochons by enterprising collectors of the unusual. Cut bayldonites are a rarity, nonetheless, and are seldom seen in collections. The luster of cabochons is sometimes almost metallic and provides a curious appearance to the cut stones. Bayldonite provides a curious appearance to the cut stones. Bayldonite is compact but too soft for rings; it could be worm in bola ties and pendants.

NAME: After Mr. John Bayldon.