Childrenite Value, Price, and Jewelry Information

CHILDRENITE: Brazil (1.37). Photo © Joel E. Arem, PhD, FGA. Used with permission.

Childrenite

Cut childrenite is a great rarity, and all gems are small. Cut eosphorite is more abundantly available, though both materials are very scarce.

Childrenite Information

Data Value
Name Childrenite
Colors Brown to yellowish brown, golden yellow.
Crystallography Orthorhombic. Crystals equant, pyramidal, platy, often doubly terminated.
Refractive Index 1.63-1.685
Luster Vitreous to resinous.
Hardness 5
Fracture Uneven to subconchoidal
Specific Gravity 3.2 (pure Fe end member).
Birefringence 0.030-0.040.
Cleavage Poor
Stone Sizes Childrenite occurs in brown, opaque crystals up to several inches long. Transparent material is much smaller, and facetable crystals yield stones up to about 3-4 carats. In general, cuttable material in this series is closer to the eosphorite end. Devonian Group (Calgary, Alberta, Canada): 3.58 (Brazil).
Luminescence None.
Luminescence Present No
Transparency Transparent to opaque.
Absorption Spectrum May show lines of iron spectrum.
Formula

(Fe,Mn)AIPO4(OH)2 · H2O

Pleochroism

Distinct: yellow/pink/colorless to pale pink.

Optics

a = 1.63-1.645; β = 1.65-1.68; γ = 1.66-1.685. Biaxial (-), 2V= 40-45°.

Optic Sign Biaxial -

Series to Eosphorite if Mn exceeds Fe.

OPTICS: a = 1.63-1.645; β = 1.65-1.68; γ = 1.66-1.685. Biaxial (-), 2V= 40-45°.

OCCURRENCE: In granite pegmatites and hydrothermal vein deposits.

Cornwall, England; Greifenstein  Germany; Custer, South Dakota.

Minas Gerais, Brazil: gemmy crystals. These are found to be Fe: Mn = 1:1 and could be called childro-eosphorite.

COMMENTS: Cut childrenite is a great rarity, and all gems are small. Cut eosphorite is more abundantly available, though both materials are very scarce.

NAME: J. G. Children, English mineralogist.