Pyrite-quartz cluster, 27 x 13 cm, Unique Piece 072

This exceptional mineral specimen, featuring quartz and Pyrite, comes from Borneo (Indonesia), a region known for its rare and aesthetically striking mineral finds. The specimens are recovered from former gold mines, many of which are now flooded or have been abandoned. Collectors seek out particularly rare specimens there, such as rainbow Pyrite with iridescent patina, as well as other high-quality minerals.

The base of the mineral specimen measures approximately 27 x 13 cm, and it weighs about 3.8 kg—an impressive collector’s item with decorative appeal.

Localities: Beruang Tengah Prospect, Beruang Kanan Orefield, Gunung Mas Regency, Central Kalimantan, Borneo, Indonesia

Quartz with Pyrite – Fascinating Structures & Formation In this mineral specimen, pyrite occurs both as an inclusion within the quartz and as growth on the crystal faces. This combination is a clear indication of complex geological formation processes.

Formation occurs in hydrothermal solutions: First, the Pyrite crystallizes; then the quartz grows and encloses the already existing Pyrite crystals. This creates the characteristic structures “frozen” within the quartz, making each piece a unique work of natural art.

Mineral Specimen for Collectors, Retail, and Exhibition This high-quality quartz-Pyrite mineral specimen is ideal for mineral shops, gemstone stores, and museum gift shops that wish to offer their customers exceptional and rare collector’s items.

Thanks to the combination of a rare locality, distinctive appearance, and fascinating formation history, this piece is an attractive eye-catcher—both for collectors and for display in retail settings or exhibitions.