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Black Hills Minerals

Thursday, 22 November 2012 09:00 AM

The Black Hills, area of 80 x 240km, is home to over 300 mineral species. Species are found in a variety of geological environments including metallic vein deposits, large scale hydrothermally altered deposits, subterranean alpine, passive sedimentary, metamorphic, and of course pegmatite deposits. By and large most of the minerals are silicates and secondary phosphates. We love the Black Hills for this diversity. Don't miss this one, you'll be surprised at what we pull out.

Baryte

with Calcite - #25088

$550.00 - Available
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Locality: Elk Creek, Meade Co., South Dakota, United States
Formula: BaSO₄
Availability: Available
Price: $550.00
Notes: Discounts/Promos do NOT apply to this item
Size: 8 x 6.5 x 5 cm - Sm Cabinet
Tagged: sulfate
Special Info: Classic Locality

A larger specimen with two unique Barite crystals to 2.5cm each nicely set on the top of Calcite covered matrix. Both crystals show good clarity and excellent deep golden color and are nicely terminated with minor frosting on the tip.

This specimen sits perfectly without aid. The rest of the matrix is composed of rich honey colored Calcite crystals to 8mm in a large pocket about 2cm deep giving this specimen added dimension. Excellent, interesting specimen with no damage!!

Baryte

Formula: BaSO4
Crystal System: Orthorhombic
Crystal Habit: Tabular, Prismatic, Massive - Fibrous
Cleavage: Perfect, Perfect, Imperfect
Luster: Vitreous (Glassy)
Color: white, yellowish white, grayish white, brownish white, dark brown
Streak: white
Class: Orthorhombic - Dipyramidal
Fracture: Uneven
Hardness: 3-3.5

Special Info: Classic Locality

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

Baryte

with Calcite - #25085

$550.00 - Available
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Locality: Elk Creek, Meade Co., South Dakota, United States
Formula: BaSO₄
Availability: Available
Price: $550.00
Size: 7 x 6 x 4.5 cm - Sm Cabinet

This excellent display specimen sits perfect without aid. There is one main 4.5cm golden-amber colored Barite nicely centered on yellow-golden Calcite matrix. There are several other smaller Barite crystals one to 1.2cm and is terminated. Another crystal in back is fractured off. Still, an excellent specimen.

Baryte

Formula: BaSO4
Crystal System: Orthorhombic
Crystal Habit: Tabular, Prismatic, Massive - Fibrous
Cleavage: Perfect, Perfect, Imperfect
Luster: Vitreous (Glassy)
Color: white, yellowish white, grayish white, brownish white, dark brown
Streak: white
Class: Orthorhombic - Dipyramidal
Fracture: Uneven
Hardness: 3-3.5

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

SOLD

Baryte

#PD34516

$45.00 - Sold
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Locality: Elk Creek, Meade Co., South Dakota, United States
Formula: BaSO₄
Availability: Sold
Size: 6.5 x 6 x 4 cm - Sm Cabinet

Typically you see these huge beautiful crystals of Baryte from Elk Creek. They are world renowned. But here is an affordable, but nice, golden Baryte from Elk Creek with dozens of crystals to over 1cm all nicely terminated with just a few broken. I didn't take a photo of it, but the side shows part of the ammonite in which the Baryte crystals formed.

Baryte

Formula: BaSO4
Crystal System: Orthorhombic
Crystal Habit: Tabular, Prismatic, Massive - Fibrous
Cleavage: Perfect, Perfect, Imperfect
Luster: Vitreous (Glassy)
Color: white, yellowish white, grayish white, brownish white, dark brown
Streak: white
Class: Orthorhombic - Dipyramidal
Fracture: Uneven
Hardness: 3-3.5

Collection: Phillips Collection

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

SOLD

Baryte

#PD34518

$35.00 - Sold
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Locality: Pierre Fm, Meade Co., South Dakota, United States
Formula: BaSO₄
Availability: Sold
Size: 8.5 x 5.5 x 5 cm - Sm Cabinet

Ammonite with clear crystals of Baryte to 1cm.

Baryte

Formula: BaSO4
Crystal System: Orthorhombic
Crystal Habit: Tabular, Prismatic, Massive - Fibrous
Cleavage: Perfect, Perfect, Imperfect
Luster: Vitreous (Glassy)
Color: white, yellowish white, grayish white, brownish white, dark brown
Streak: white
Class: Orthorhombic - Dipyramidal
Fracture: Uneven
Hardness: 3-3.5

Collection: Phillips Collection

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

SOLD

Bobdownsite-Whitlockite

#34508

$75.00 - Sold
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Locality: Tip Top mine, Custer Co., South Dakota, United States
Formula: Ca₉Mg(PO₄)₆(PO₃F)
Availability: Sold
Size: 7 x 4 x 2.5 cm - Sm Cabinet
Tagged: phosphate

An excellent specimen of rich clear rhombs of Bobdownsite on pink orthoclase matrix. We have hyphenated it with Whitlockite as the jury is still out on this identification. It may be both. Raman analyses at the RRUFF project has thus shown all Whitlockites from the Tip Top mine to be Bobdownsite. But there is a chance that fluorine maybe detected by inclusions of fluorapatite in the crystals. It is very difficult to distiguish F from OH with EDS without doing a polished section. Whatever the case, it is academic and not really important in the overall scheme and parageesis of pegmatitic mineralogy (or is it?). We look forward to your comments. You will find a good thread on Mindat.

A case in point: Look close at these photos. There are sprays of white apatite scattered about the surfaces of the Bob-Whit xls. These may be carbonate apatite but may contain Fluorine to some degree.