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Shigaite On Baryte

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KMF604650

Shigaite On Baryte

Classic Locality

Description Tabs

Description
Locality: 
NChwaning II Mine, Kuruman, Kalahari, Northern Cape Province, South Africa
Class: 
Combination
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.7 × 4.4 × 3.3 cm
Description

Paul Balayer explained to me that there were only three specimen in this 2016 discovery, one was damaged badly so I bought the two best. This is undoubtedly the finest as well as the only specimen that featured the association with rhodochrosite. Prismatic barite is rare from the kalahari manganese field and this is the largest single crystal that I have personally come across.

The sharp and well defined hexagonal crystal exhibits a fine chisel like termination. Super aesthetic and full of character- the key feature in my opinion is the largest barite crystal face is clean unlike all its others that are mineralized over inhibiting any sight of what is inside- the window reveals water clear gemmy interior a perfect inclusion of a phantom that mirrors the termination precisely.

The rhodochrosite mineralization occurred before the shigaite, evident by the placement of the robust well defined hexagonal redcrystals on top of the rhodochrosite matrix attached to the barite both at the attachments below and the termination area.

These shigaite are well developed and not the usual thin leaflets that you would expect in this size category, instead thick edges with substantial body is featured in every one of the fifty plus crystals present here. The shigaite isolation is fascinating since each one appears to stand alone. The rhodochrosite adds a dazzling sparkle to the grey manganese coating the exterior. Paul explained that this specimen cleaved into two parts and he repaired it, the repair can be seen two thirds down from the termination, so if you like you can separate the termination end off and have an undamaged specimen. Under the circumstances the specimen has not lost any value since there is only one other in existence and without rhodochrosite.

The repair is least noticeable from the main display position face on into the windowed barite.

Mineral Data
What's on the rock

Shigaite

Formula: 
Mn6Al3(OH)18[Na(H2O)6][SO4]2·6H2O
Strunz: 
7.DD.35
Hardness: 
0.0
Type Locality: 
Ioi mine, Ritto City, Shiga Prefecture, Kinki Region, Honshu Island, Japan

Baryte

Formula: 
BaSO4
Strunz: 
7.AD.35
Hardness: 
3.0 - 3.5
Streak: 
White

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Starting price

$1200
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Shipping Information

Postage Area Price
USA
$40
UK
£38
Europe
40
Rest of the world
$40

Seller Information

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