Thomsonite - Poona, India | Ref. 564

This Thomsonite from Poona (India) shows a well-developed surface of orange needles, dense and uniform, forming a very readable crystalline texture. The white areas on the right side correspond to radial bundles, clearly differentiated and creating a marked visual contrast with the warmer central zone. The whole sits on a dark matrix typical of the region’s zeolites, providing a stable base and enhancing the acicular texture.

With a width of 67 mm and a height of 35 mm, combined with its clear display stand, the piece is immediately ready for display. It remains compact while clearly showing the fibrous structure characteristic of Thomsonite. The orange coloration, less common than the white or cream tones generally seen in this mineral, brings a warm hue that stands out nicely in a showcase or within a themed collection of Indian zeolites.

🟢 Mineralogical Information

- Chemical formula : NaCa₂Al₅Si₅O₂₀·6H₂O

- Crystal system : Orthorhombic

- Luster : Vitreous to silky on fibrous aggregates

- Hardness : 5 – 5.5 (Mohs)

- Density : Approx. 2.3 – 2.4 g/cm³

- Common habit : Needles, fibrous clusters, radial or spherical structures

- Typical associations : Apophyllite, stilbite, heulandite, calcite