Serpentine Tumblestone 20-30mm Polished Green Serpentine Mineral Natural Gemstone Specimen Collectors Stone Gift with Certificate Authenticity
£ 1.56
Product OverviewThis Serpentine tumblestone is a genuine natural mineral specimen, carefully
selected and polished to highlight its smooth texture and rich green tones. Each piece measures approximately 20–30mm and is supplied with a Certificate of Authenticity lifetime guarantee card. The photograph shown represents an example of the quality and appearance you will receive, with each stone displaying unique natural patterns and colour variations. Please refer to the images for full sizing and scale.Mineral Identification and CompositionSerpentine refers to a group of magnesium-rich phyllosilicate minerals, commonly including antigorite, lizardite, and chrysotile. These minerals share a similar chemical composition, typically expressed as Mg₃Si₂O₅(OH)₄, and are formed through the alteration of ultramafic rocks.The name “Serpentine” is derived from its characteristic green colour and often mottled or veined appearance, reminiscent of snake skin. It is widely used as a decorative stone due to its attractive colour and relatively soft, workable nature.Crystal Structure and Physical PropertiesSerpentine minerals crystallise in different systems depending on the specific variety, though they are most commonly found in massive, compact forms rather than distinct crystals. This makes them particularly suitable for tumbling and polishing.Typical properties include:
• Colour: Various shades of green, from light olive to deep forest green, sometimes with yellow or brown undertones
• Lustre: Waxy to silky when polished
• Transparency: Opaque to slightly translucent in thinner areas
• Hardness: Approximately 2.5–5.5 on the Mohs scale, depending on the specific varietyThe tumbling process enhances the stone’s natural surface, producing a smooth, rounded finish that brings out its colour and subtle patterning.Geological Formation and OccurrenceSerpentine forms through a geological process known as serpentinisation, where ultramafic rocks such as peridotite react with water under specific temperature and pressure conditions. This transformation alters the original minerals into serpentine group minerals, often creating dense, green masses.These rocks are commonly found in regions associated with tectonic activity, particularly along convergent plate boundaries and in ophiolite complexes. Notable sources include Italy, Greece, China, the United States, and parts of the United Kingdom.Appearance and Natural VariationEach Serpentine tumblestone is unique, with variations in shade, pattern, and internal structure. Some stones may display uniform green colouring, while others show mottled textures, veining, or subtle tonal shifts.The polished finish enhances these natural characteristics, giving the stone a smooth feel and a soft sheen. These variations are a natural result of the mineral’s formation and contribute to the individuality of each specimen.Uses and Collecting AppealSerpentine tumblestones are popular among mineral collectors, gemstone enthusiasts, and those seeking natural decorative stones. Their distinctive green tones and smooth finish make them suitable for display, gifting, or inclusion in curated mineral collections.In cultural and non-scientific contexts, serpentine is traditionally associated with transformation and connection to nature and is often appreciated in spiritual practices. These associations are based on historical and cultural traditions rather than scientific properties.Authenticity and Presentation
• Genuine Serpentine mineral specimen
• Size range: approximately 20–30mm
• Smooth polished tumblestone finish
• Supplied with a Certificate of Authenticity lifetime guarantee card
• Listing image shows an example of the specimen you will receiveThis natural serpentine stone offers a combination of geological interest, attractive colour, and polished presentation, making it a versatile addition to any mineral collection or gift selection.
selected and polished to highlight its smooth texture and rich green tones. Each piece measures approximately 20–30mm and is supplied with a Certificate of Authenticity lifetime guarantee card. The photograph shown represents an example of the quality and appearance you will receive, with each stone displaying unique natural patterns and colour variations. Please refer to the images for full sizing and scale.Mineral Identification and CompositionSerpentine refers to a group of magnesium-rich phyllosilicate minerals, commonly including antigorite, lizardite, and chrysotile. These minerals share a similar chemical composition, typically expressed as Mg₃Si₂O₅(OH)₄, and are formed through the alteration of ultramafic rocks.The name “Serpentine” is derived from its characteristic green colour and often mottled or veined appearance, reminiscent of snake skin. It is widely used as a decorative stone due to its attractive colour and relatively soft, workable nature.Crystal Structure and Physical PropertiesSerpentine minerals crystallise in different systems depending on the specific variety, though they are most commonly found in massive, compact forms rather than distinct crystals. This makes them particularly suitable for tumbling and polishing.Typical properties include:
• Colour: Various shades of green, from light olive to deep forest green, sometimes with yellow or brown undertones
• Lustre: Waxy to silky when polished
• Transparency: Opaque to slightly translucent in thinner areas
• Hardness: Approximately 2.5–5.5 on the Mohs scale, depending on the specific varietyThe tumbling process enhances the stone’s natural surface, producing a smooth, rounded finish that brings out its colour and subtle patterning.Geological Formation and OccurrenceSerpentine forms through a geological process known as serpentinisation, where ultramafic rocks such as peridotite react with water under specific temperature and pressure conditions. This transformation alters the original minerals into serpentine group minerals, often creating dense, green masses.These rocks are commonly found in regions associated with tectonic activity, particularly along convergent plate boundaries and in ophiolite complexes. Notable sources include Italy, Greece, China, the United States, and parts of the United Kingdom.Appearance and Natural VariationEach Serpentine tumblestone is unique, with variations in shade, pattern, and internal structure. Some stones may display uniform green colouring, while others show mottled textures, veining, or subtle tonal shifts.The polished finish enhances these natural characteristics, giving the stone a smooth feel and a soft sheen. These variations are a natural result of the mineral’s formation and contribute to the individuality of each specimen.Uses and Collecting AppealSerpentine tumblestones are popular among mineral collectors, gemstone enthusiasts, and those seeking natural decorative stones. Their distinctive green tones and smooth finish make them suitable for display, gifting, or inclusion in curated mineral collections.In cultural and non-scientific contexts, serpentine is traditionally associated with transformation and connection to nature and is often appreciated in spiritual practices. These associations are based on historical and cultural traditions rather than scientific properties.Authenticity and Presentation
• Genuine Serpentine mineral specimen
• Size range: approximately 20–30mm
• Smooth polished tumblestone finish
• Supplied with a Certificate of Authenticity lifetime guarantee card
• Listing image shows an example of the specimen you will receiveThis natural serpentine stone offers a combination of geological interest, attractive colour, and polished presentation, making it a versatile addition to any mineral collection or gift selection.
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