J archived mineral specimens

Jagoite

#PD39462

Availability: Sold

Locality: Långban, Filipstad, Värmland, Sweden
Formula: (Pb,Na)₃(Fe³⁺,Mg)Si₃O₁₀(Cl,OH)
Size: Thumbnail 1.5x1x1cm
Special Info: Type Locality

Bright yellowish green platlets of Jagoite in 1-2mm aggregates. Ex. A.L. Mcguinness.

Jagoite at Dakota Matrix Jagoite at WebMineral Jagoite at MinDat

Jahnsite-(Camnmg)

#BN50208

Availability: Sold

Locality: Tip Top mine, Custer Co., South Dakota, United States
Formula: CaMn²⁺Mg₂Fe³⁺₂(PO₄)₄(OH)₂·8H₂O
Size: SmCabinet 9x6x4cm
Tagged: phosphate , pegmatite mineral
Special Info: Type Locality

Dark reddish brown striated crystals of Jahnsite with good rich coverage on Quartz and Triphyllite.

Jahnsite-(Camnmg) at Dakota Matrix Jahnsite-(Camnmg) at WebMineral Jahnsite-(Camnmg) at MinDat

Jahnsite-(Camnmg)

#57261

Availability: Sold

Locality: Tip Top mine, Custer Co., South Dakota, United States
Formula: CaMn²⁺Mg₂Fe³⁺₂(PO₄)₄(OH)₂·8H₂O
Size: Miniature 4.5x1.5x2cm
Tagged: phosphate , pegmatite mineral

A complicated specimen loaded with many minerals. The main mineral is nut brown, striated Jahnsite-(CaMnMg). This is the original Jahnsite prior to the breakout of additional Jahnsites based upon the major elements occupying the structural sites. This particular Jahnsite is about the only one that you can visually identify at the Tip Top. The rest aren't necessarily identified easily based upon color. There is another Jahnsite on this specimen, which is yellow and much smaller. Additionally there is black, acicular Rockbridgeite & pink Hureaulite crystals. The Hureaulte is about 2mm and is pink with yellow Jahnsite on the surface and pseudomorphing. There is also purple Leucophosphite.

Jahnsite-(Camnmg) at Dakota Matrix Jahnsite-(Camnmg) at WebMineral Jahnsite-(Camnmg) at MinDat