Description
Product Overview
This 250g bag of large Sodalite tumblestones from Brazil features carefully selected natural crystal pieces, each measuring approximately 30–40mm. These polished stones display the classic deep blue tones and white veining that make Sodalite a highly recognisable and desirable mineral. Supplied with a Certificate of Authenticity lifetime guarantee card, this bulk set is ideal for collectors, display, gifting, or resale. The listing photo shows an example of the stones you will receive, with each bag containing a unique mix of patterns and colour variations. Please refer to the image for full sizing and scale.
Mineral Identification and Composition
Sodalite is a tectosilicate mineral with the chemical formula Na₈(Al₆Si₆O₂₄)Cl₂. It belongs to the feldspathoid group and is closely related to minerals such as lazurite, which is found in lapis lazuli. Sodalite is known for its rich royal blue colour, often interspersed with white calcite veins or patches.
The presence of sodium and chlorine within its structure gives Sodalite its distinctive composition, while trace elements and mineral inclusions contribute to its varied appearance.
Crystal Structure and Physical Properties
Sodalite crystallises in the cubic crystal system, although it is most commonly found in massive form rather than as well-defined crystals. Its polished tumblestone form enhances its natural colour and patterning, making it visually striking and smooth to the touch.
Typical properties include:
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Colour: Deep blue with white calcite veining or mottling
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Lustre: Vitreous to greasy when polished
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Transparency: Opaque
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Hardness: 5.5–6 on the Mohs scale
The tumbling process smooths the surface and highlights the contrast between the blue sodalite and lighter mineral inclusions.
Geological Formation and Brazilian Origin
Sodalite forms in silica-poor igneous rocks, particularly nepheline syenites and other alkaline intrusive environments. These geological conditions allow feldspathoid minerals like sodalite to crystallise instead of quartz.
Brazil is a major global source of high-quality Sodalite, producing material with strong colour saturation and attractive veining. The deposits are associated with large igneous complexes where mineral-rich magma cools slowly, allowing the formation of coarse-grained rock containing sodalite.
Appearance and Natural Variation
Each tumblestone in this 250g bag is unique, with variations in colour intensity, pattern, and distribution of white calcite inclusions. Some stones may display bold, solid blue tones, while others feature intricate marbling or contrasting patterns.
The polished finish enhances the natural beauty of each piece, bringing out the depth of colour and smooth texture. These variations are a natural result of the mineral’s formation and add to the individuality of every stone.
Uses and Collecting Appeal
Sodalite tumblestones are popular among mineral collectors, gemstone enthusiasts, and those looking for decorative natural stones. The larger size range of 30–40mm makes these pieces particularly suitable for display, crafting, or use in curated collections.
In non-scientific and cultural contexts, Sodalite is traditionally associated with clarity and insight and is often appreciated in spiritual practices. These interpretations are based on historical and cultural traditions rather than scientific properties.
Authenticity and Presentation
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Genuine Sodalite mineral from Brazil
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250g bulk bag of large tumblestones
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Individual stone size: approximately 30–40mm
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Smooth polished finish with natural variation
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Supplied with a Certificate of Authenticity lifetime guarantee card
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Listing image shows an example of the stones you will receive
This Sodalite tumblestone set offers a combination of Brazilian origin, bold natural colouration, and polished presentation, making it an excellent addition to any mineral collection or display selection.
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