Moving mountains for you
Switch currency

Current Live Auctions

Current Live Fixed Price Sales

Polybasite & Chalcopyrite

Views:
Watches:
MNT717979

Polybasite & Chalcopyrite

ex Dr. F. Krantz - no old label
Classic Locality

Description Tabs

Description
Locality: 
Enterprise Mine, Newman Hill, Dolores County, Colorado, United States of America
Class: 
Crystal Group/Cluster
Size Range: 
Thumbnail (1-3cm)
Size: 
2.3 × 1.6 × 1.2 cm
Description

Interesting thumbnail of this rarer silver sulfide: dark greyish crystal aggregate of polybasite (according to the box where this and other specimens resided at Krantz) with edge wear and probably chalcopyrite. Classic old timer from Krantz, Bonn, no old label.

Mineral Data
What's on the rock

Polybasite

Formula: 
[(Ag,Cu)6(Sb,As)2S7][Ag9CuS4]
Strunz: 
2.GB.15
Crystal System: 
Monoclinic - Prismatic
Hardness: 
2.5 - 3.0
Streak: 
black

Chalcopyrite

Formula: 
CuFeS2
Strunz: 
2.CB.10a
Crystal System: 
Tetragonal
Hardness: 
3.5 - 4.0

Seller Information

Payment options: offline, paypal_wpp, paypal_wps

Seller's terms and conditions

Terms & Conditions

Thank you for your interest in my offers! Payment is possible via Paypal, bank transfer or cash if you pick up the item(s) personally. Bank data will be provided after settling the auction/transaction(s) if needed.

In case you are not happy with a specimen, you may send it back within 4 weeks. After receipt, i will refund the price minus shipping costs. Please inform me before sending an item back. If you have any questions (or maybe complaints) please feel free to contact me.

Best regards Roger