Cabinet No. 40 - Mineral Collection

Cabinet No. 40 is a Polish online store with collector-grade mineral specimens. We specialize in rare species, Polish localities, native copper from Dzhezkazgan (Kazakhstan) and classic European minerals. Every specimen is photographed in high resolution and described to IMA (International Mineralogical Association) nomenclature: chemical formula, crystal system, Mohs hardness, mineral group, locality, size in mm, weight in grams.

Free domestic shipping in Poland over 300 PLN via InPost lockers or courier. International shipping is European Union only (FedEx Economy). We also run a free mineral Knowledge Base and the Collector Panel - an app for cataloging private collections with museum-grade labels and AI descriptions.

Featured specimens for sale

Shop →

Collector Panel

Free for up to 50 specimens. Cloud cataloging of your collection, museum-grade PDF labels, AI descriptions, public sharing, statistics, world map of finds, offline Field Mode and Quick Capture.

Collector Panel →

Mineral knowledge base

A free encyclopedia of species: chemistry, crystallography, type localities, Strunz and Dana classification.

Mineral knowledge base →

Frequently asked questions

Why is it called Cabinet No. 40?

"Cabinet" refers to collector display cabinets — mine were multiplying quickly as my mineral collection grew. The number 40 came from my 40th birthday, which I was celebrating at the time. It has nothing to do with kitchen furniture or a government cabinet — it means mineral display cabinets and my original private collector profile.

Where do Cabinet No. 40 specimens come from?

Worldwide, with a focus on Polish localities (Lower Silesia, Tatra Mountains), native copper from Dzhezkazgan in Kazakhstan and classic European species. Every specimen lists its exact locality.

Do you follow IMA nomenclature?

Yes, strictly. All mineral names follow the IMA-CNMNC list with correct spelling (e.g. "matrix" never "matryca"), chemical formulas and mineral groups.

How does shipping work?

Poland: InPost lockers or courier, free over 300 PLN. International: European Union only via FedEx Economy. Every specimen is packed individually in cotton wool and collector boxes.

Can I return a specimen?

Yes, 14-day no-questions-asked return under EU consumer law.

What is the Collector Panel?

Our in-house app for cataloging private mineral collections. Free up to 50 specimens. You add photos and data (locality, size, formula) and the system generates museum-grade PDF labels and AI descriptions. Works offline in the field.

Does every specimen come with a certificate?

Every specimen has a full database record with locality, size and weight. Higher-value pieces ship with extra collector cards.