Bayldonite Value, Price, and Jewelry Information

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

Bayldonite

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 Information

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

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.