Three Little Pegmatites

SOLD

Leucophosphite

with Jahnsite, Rockbridgeite etc - #55135

Details
Data
Provenance
Resources

Locality: Tip Top mine, Custer Co., South Dakota, United States
Formula: KFe³⁺₂(PO₄)₂(OH)·2H₂O
Availability: Sold
Size: 3 x 2 x 1 cm - Thumbnail
Tagged: phosphate , pegmatite mineral

Here ya go: 26 small specimens, the largest is 3cm and the smallest is 9mm. There are micro crystals the said minerals on all of the specimens plus Hureaulite and Laueite and who knows what else - I haven't looked at them all.

Leucophosphite

Formula: KFe³⁺₂(PO₄)₂(OH)·2H₂O
Crystal System: Monoclinic
Cleavage: Indistinct, None, None
Luster: Vitreous - Dull
Color: brown, brownish yellow, colorless, greenish, white
Streak: white
Class: Monoclinic - Prismatic
Fracture: Brittle
Hardness: 3.5

Mineralpedia: View Leucophosphite
On Dakota Matrix: Previously Sold Leucophosphite
On Dakota Matrix: Other Available Leucophosphite
WebMineral: View Leucophosphite
Mindat: View Leucophosphite

SOLD

Montgomeryite

with Roscherite & Englishite - #BN55086

Details
Data
Provenance
Resources

Locality: Tip Top mine, Custer Co., South Dakota, United States
Formula: Ca₄MgAl₄(PO₄)₆(OH)₄·12H₂O
Availability: Sold
Size: 6 x 4.5 x 2 cm - Sm Cabinet
Tagged: phosphate , pegmatite mineral

A Beryl matrix specimen with a typical assemblage of crystalline layers of pinkish red Roscherite, pearly white balls of Englishite and red groups of Montgomeryite.

Montgomeryite

Formula: Ca₄MgAl₄(PO₄)₆(OH)₄·12H₂O
Crystal System: Monoclinic
Cleavage: Perfect, Indistinct, None
Luster: Vitreous (Glassy)
Color: colorless, yellowish, white, green, red
Streak: white
Class: Monoclinic - Prismatic
Hardness: 4

Collection: Dr. Buford Nichols Collection

Mineralpedia: View Montgomeryite
On Dakota Matrix: Previously Sold Montgomeryite
On Dakota Matrix: Other Available Montgomeryite
WebMineral: View Montgomeryite
Mindat: View Montgomeryite

SOLD

Montgomeryite

with Englishite and Robertsite - #BN55087

Details
Data
Provenance
Resources

Locality: Tip Top mine, Custer Co., South Dakota, United States
Formula: Ca₄MgAl₄(PO₄)₆(OH)₄·12H₂O
Availability: Sold
Size: 10 x 7 x 3.5 cm - Cabinet
Tagged: phosphate , pegmatite mineral

A Quartz matrix specimen with flat-lying red laths of Montgomerite from 1 to 2mm and white balls of Englishite and tiny deep red Robertsite, less than 0.25mm.

Montgomeryite

Formula: Ca₄MgAl₄(PO₄)₆(OH)₄·12H₂O
Crystal System: Monoclinic
Cleavage: Perfect, Indistinct, None
Luster: Vitreous (Glassy)
Color: colorless, yellowish, white, green, red
Streak: white
Class: Monoclinic - Prismatic
Hardness: 4

Collection: Dr. Buford Nichols Collection

Mineralpedia: View Montgomeryite
On Dakota Matrix: Previously Sold Montgomeryite
On Dakota Matrix: Other Available Montgomeryite
WebMineral: View Montgomeryite
Mindat: View Montgomeryite

SOLD

Montgomeryite

with Hurlbutite - #BN55088

Details
Data
Provenance
Resources

Locality: Tip Top mine, Custer Co., South Dakota, United States
Formula: Ca₄MgAl₄(PO₄)₆(OH)₄·12H₂O
Availability: Sold
Size: 10 x 7 x 2.5 cm - Cabinet
Tagged: phosphate , pegmatite mineral

An excellent specimen with rich coverage of bead-like, colorless Hurlbutite, red groups of lath-like Montgomeryite to about 0.75mm, dark red Roberite and/or Mitridatite (green) and minor Englishite.