Collection of Rough Mineral Specimens featuring Pyrite or Chalcopyrite embedded in Matrix - Qty 14




Overview


A curated collection of 14 irregular rock fragments showcasing metallic brass-yellow to golden flecks of pyrite or chalcopyrite minerals dispersed within a host rock matrix. These specimens display the characteristic iridescent or greenish weathering and tarnish associated with secondary copper minerals, typical of oxidised sulphide deposits.




Specimen Details


Each fragment exhibits:


• Metallic lustre with brass-yellow to golden colouration from primary pyrite or chalcopyrite mineralisation

• Iridescent or greenish weathering patina indicating secondary copper mineral alteration

• Host rock matrix composed primarily of quartz or altered silicate rock

• Irregular, angular morphology consistent with natural fracturing and weathering

• Size Largest 61mm x 27mm x 55mm



Composition


Primary minerals: Iron sulphide (pyrite, FeS2) and copper iron sulphide (chalcopyrite, CuFeS2)

Secondary minerals: Oxidised copper minerals (malachite, azurite, or other copper carbonates/hydroxides) visible as greenish or iridescent tarnish

Host matrix: Quartz and altered silicate rock



Condition


Rough, unpolished specimens in natural state. Specimens show natural weathering consistent with field collection. No restoration or treatment applied. All 14 pieces present and intact.




Collector Information


These specimens are suitable for mineral collectors, geology students, educational displays, or those interested in sulphide mineralogy and oxidation processes. The visible secondary copper mineralisation makes these particularly instructive examples of weathering and alteration in ore deposits.




Lot Details


Quantity: 14 individual specimens

Condition: Rough, natural state

Origin: Field-collected mineral specimens



Sold as a complete lot. Buyer to inspect prior to bidding. Suitable for display, study, or collection purposes.

** This Auction is ONLINE VIEWING and SHIPPING ONLY **

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