Quartz Tumbled- 1.1 g
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Polished quartz from the Costa Dorada coast in Spain; total weight 1.1 kg; natural round pebbles/clasts lot.
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Description from the seller
Batch of natural pebbles (clasts) – Costa Dorada, Spain – Mineralogical and Petrological Selection
Technical Description of the Batch
This batch consists of a selection of pebbles (continental clasts) gathered along the coast of Costa Dorada (Tarragona, Spain). Each piece has undergone a natural process of marine abrasion and mechanical erosion over a prolonged geological period, resulting in a sub-spherical and ellipsoidal morphology with smooth-polished texture surfaces, free of sharp edges.
(Presentation note: The pieces have been photographed on a black and moist background to highlight contrast, saturation of their natural colors, and the internal structure of their veins).
Petrological and Mineralogical Classification of the Batch:
The collection offers a representative sample of the region’s coastal geology, highlighting the following lithological families:
Siliceous Rocks (Quartz and Quartzite): Specimens of high hardness (≈ 7 on the Mohs scale). They appear in translucent, milky varieties with iron oxide patinas that give them yellowish and orange tones.
Jaspers (Microcrystalline quartz variety): Clasts colored red and ochre due to the presence of microinclusions of hematites and other iron oxides. They exhibit the typical concoidal fracture.
Plutonic Igneous Rocks (Granites): Phaneritic texture of medium-fine grain. Visible composition of quartz, potassium feldspar (orthoclase) and micas (biotite/muscovite), producing the characteristic speckled appearance or "checkerboard texture".
Metamorphic and Sedimentary Rocks (Limestones/Shales): Fractures closed secondarily by veins of recrystallized white calcite, creating striking structural contrasts over gray and brown matrices.
Technical Data Sheet of the Batch
Geographic Origin: Alluvial and coastal deposits of Costa Dorada, Mediterranean Sea (Spain).
Treatment: None. 100% natural specimens, washed exclusively with demineralized water to remove soluble salts (nitrate) and for basic biological disinfection. No varnishes, oils, or synthetic waxes.
Status: Excellent structural conservation. No recent fractures or mechanical exfoliation.
Applications: Natural history collecting, educational geoscience samples, aquatic landscaping (aquascaping) and minimalist or rustic interior design applications.
Total approximate weight: 1.1 kg (1100 grams).
Notice: This description was produced with the help of artificial intelligence and may contain some errors in the description.
Batch of natural pebbles (clasts) – Costa Dorada, Spain – Mineralogical and Petrological Selection
Technical Description of the Batch
This batch consists of a selection of pebbles (continental clasts) gathered along the coast of Costa Dorada (Tarragona, Spain). Each piece has undergone a natural process of marine abrasion and mechanical erosion over a prolonged geological period, resulting in a sub-spherical and ellipsoidal morphology with smooth-polished texture surfaces, free of sharp edges.
(Presentation note: The pieces have been photographed on a black and moist background to highlight contrast, saturation of their natural colors, and the internal structure of their veins).
Petrological and Mineralogical Classification of the Batch:
The collection offers a representative sample of the region’s coastal geology, highlighting the following lithological families:
Siliceous Rocks (Quartz and Quartzite): Specimens of high hardness (≈ 7 on the Mohs scale). They appear in translucent, milky varieties with iron oxide patinas that give them yellowish and orange tones.
Jaspers (Microcrystalline quartz variety): Clasts colored red and ochre due to the presence of microinclusions of hematites and other iron oxides. They exhibit the typical concoidal fracture.
Plutonic Igneous Rocks (Granites): Phaneritic texture of medium-fine grain. Visible composition of quartz, potassium feldspar (orthoclase) and micas (biotite/muscovite), producing the characteristic speckled appearance or "checkerboard texture".
Metamorphic and Sedimentary Rocks (Limestones/Shales): Fractures closed secondarily by veins of recrystallized white calcite, creating striking structural contrasts over gray and brown matrices.
Technical Data Sheet of the Batch
Geographic Origin: Alluvial and coastal deposits of Costa Dorada, Mediterranean Sea (Spain).
Treatment: None. 100% natural specimens, washed exclusively with demineralized water to remove soluble salts (nitrate) and for basic biological disinfection. No varnishes, oils, or synthetic waxes.
Status: Excellent structural conservation. No recent fractures or mechanical exfoliation.
Applications: Natural history collecting, educational geoscience samples, aquatic landscaping (aquascaping) and minimalist or rustic interior design applications.
Total approximate weight: 1.1 kg (1100 grams).
Notice: This description was produced with the help of artificial intelligence and may contain some errors in the description.
Details
Main mineral
Quartz
Mineral form
Tumbled
Weight
1.1 g
Origin (region/city)
Spanish Mediterranean Costa Dorada
Country of origin
Spain
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