{"product_id":"milky-quartz-cluster-rostowrack-china-clay-pit-cornwall-no-8","title":"Milky Quartz Cluster | Rostowrack China Clay Pit, Cornwall |  No. 8","description":"\u003cp\u003eA beautiful 335g Cornish milky quartz specimen featuring interconnected crystal-lined cavities, delicate translucent quartz formations and subtle blush-pink mineral staining, attributed to the historic Rostowrack China Clay Pit at Hendra Downs, near St Dennis, Cornwall.\u003c\/p\u003e\n\u003cp\u003eThis distinctive natural specimen combines intricate quartz crystallisation with the geological heritage of Cornwall's celebrated St Austell china clay district.\u003c\/p\u003e\n\u003ch3\u003eSpecimen Description\u003c\/h3\u003e\n\u003cp\u003eThis attractive milky quartz specimen displays a broad, irregular formation with an abundance of exposed crystalline surfaces and several naturally developed cavities.\u003c\/p\u003e\n\u003cp\u003eThe most distinctive feature is a series of interconnected openings extending across the central face of the specimen. These cavities are lined with numerous small quartz crystals, producing a delicate, sparkling interior that contrasts beautifully with the surrounding pale mineral material.\u003c\/p\u003e\n\u003cp\u003eThe upper cavity is particularly interesting, with a gently arched opening revealing densely packed crystals in translucent white, pale champagne and subtle blush-pink tones.\u003c\/p\u003e\n\u003cp\u003eBeneath this opening, a second recessed area contains further quartz crystallisation, creating a layered appearance with natural mineral bridges separating the individual cavities.\u003c\/p\u003e\n\u003cp\u003eSmaller openings and crystal-lined recesses continue across the lower and right-hand portions of the specimen, adding depth and complexity to the formation.\u003c\/p\u003e\n\u003cp\u003eThe quartz ranges from opaque milky white to more translucent crystalline growth. Individual crystal faces catch the light, displaying the characteristic glassy lustre associated with quartz.\u003c\/p\u003e\n\u003cp\u003eSubtle areas of pale pink, cream and beige staining occur throughout the specimen, with occasional warmer reddish-brown tones visible around the crystalline openings.\u003c\/p\u003e\n\u003cp\u003eThese natural colour variations provide a gentle contrast against the predominantly white quartz and enhance the specimen's individual character.\u003c\/p\u003e\n\u003cp\u003eThe outer surfaces display a combination of compact, massive quartz and finely crystallised textures, with irregular ridges, natural fractures and small mineralised openings.\u003c\/p\u003e\n\u003cp\u003eViewed from different angles, the specimen reveals variations in crystal size, orientation and transparency, making it particularly interesting for close examination.\u003c\/p\u003e\n\u003cp\u003eIts substantial 335g weight and broad 96.5mm measurement make it an attractive display specimen for collectors of British minerals, Cornish quartz and naturally crystallised geological formations.\u003c\/p\u003e\n\u003ch3\u003eAbout the Mineral\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQuartz (SiO₂)\u003c\/strong\u003e is a silicon dioxide mineral belonging to the trigonal crystal system, with a Mohs hardness of 7.\u003c\/p\u003e\n\u003cp\u003eIt is one of the most abundant minerals in the Earth's continental crust and occurs in a wide range of geological environments, including igneous rocks, metamorphic rocks, sedimentary deposits and hydrothermal mineral veins.\u003c\/p\u003e\n\u003cp\u003eQuartz commonly develops when silica-bearing fluids circulate through fractures, veins and cavities within rocks. As geological conditions change, dissolved silica may precipitate and gradually form crystalline quartz.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMilky Quartz\u003c\/strong\u003e is a naturally occurring variety of quartz characterised by its cloudy-white, translucent or opaque appearance.\u003c\/p\u003e\n\u003cp\u003eThis distinctive colouration is commonly associated with microscopic fluid inclusions trapped within the crystal structure during growth.\u003c\/p\u003e\n\u003cp\u003eThese inclusions scatter incoming light, creating the characteristic milky appearance.\u003c\/p\u003e\n\u003cp\u003eMilky quartz can occur as massive vein material, individual crystals, intergrown aggregates and cavity-lining formations.\u003c\/p\u003e\n\u003cp\u003eIn this specimen, densely intergrown quartz surrounds several natural openings containing smaller crystals.\u003c\/p\u003e\n\u003cp\u003eThese cavities provide space for individual quartz crystals to develop more recognisable faces, creating a contrast between the compact surrounding material and the crystalline interiors.\u003c\/p\u003e\n\u003cp\u003eThe pale blush and reddish-brown colouration visible in selected areas may be associated with trace mineral inclusions or iron-bearing staining. The precise cause of the colouration in this individual specimen has not been analytically established.\u003c\/p\u003e\n\u003cp\u003eQuartz is particularly significant within Cornwall's granite districts, where it occurs in mineral veins, fractures and hydrothermally altered rocks.\u003c\/p\u003e\n\u003cp\u003eThe St Austell granite district is especially notable for its complex geological history involving granite crystallisation, mineralisation and extensive alteration of feldspar-bearing rocks.\u003c\/p\u003e\n\u003ch3\u003eRostowrack China Clay Pit \u0026amp; Cornish Heritage\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eRostowrack China Clay Pit\u003c\/strong\u003e is situated at Hendra Downs, near St Dennis, within Cornwall's historically important St Austell granite district.\u003c\/p\u003e\n\u003cp\u003eThe St Austell granite is internationally recognised for its extensive deposits of kaolin, commonly known as china clay.\u003c\/p\u003e\n\u003cp\u003eThese deposits developed through the alteration of feldspar-bearing granite, producing clay-rich material that became one of Cornwall's most significant industrial mineral resources.\u003c\/p\u003e\n\u003cp\u003eChina clay extraction transformed the landscape surrounding St Austell, St Dennis and neighbouring communities, creating an extensive network of pits, processing works, waste tips and associated industrial infrastructure.\u003c\/p\u003e\n\u003cp\u003eThe extracted kaolin became an important raw material for porcelain, ceramics, paper manufacture and other industries.\u003c\/p\u003e\n\u003cp\u003eUnlike Cornwall's better-known tin and copper mines, the china clay industry primarily concentrated on extracting and processing altered granite.\u003c\/p\u003e\n\u003cp\u003eHowever, the same geological environments also contain quartz veins, mineralised fractures and a variety of associated minerals.\u003c\/p\u003e\n\u003cp\u003eRostowrack is an important geological locality because its granite exposures and mineralised structures have been described in published geological field studies.\u003c\/p\u003e\n\u003cp\u003eA geological field excursion account by C. M. Bristow and J. H. Howe, published in 1995, discusses Rostowrack China Stone Quarry and China Clay Pit within the geological setting of the western St Austell granite.\u003c\/p\u003e\n\u003cp\u003eThe account provides geological information about granite alteration and quartz vein mineralisation associated with the locality.\u003c\/p\u003e\n\u003cp\u003eFurther geological documentation prepared for EUROGRANITES 2014 describes Rostowrack as an exposure of topaz-bearing granite affected by structurally controlled kaolinisation.\u003c\/p\u003e\n\u003cp\u003eThe field guide also records a prominent multistage quartz-hematite vein within the Rostowrack workings.\u003c\/p\u003e\n\u003cp\u003eThese documented geological features establish quartz mineralisation as an important component of the locality's mineralogical history.\u003c\/p\u003e\n\u003cp\u003eMineralogical locality records also document quartz and several other minerals from Rostowrack, reflecting the complex relationship between granite crystallisation, hydrothermal activity and subsequent alteration.\u003c\/p\u003e\n\u003cp\u003eThe wider St Austell district also has strong historical associations with china stone extraction.\u003c\/p\u003e\n\u003cp\u003eChina stone is a feldspar-bearing granitic material historically used in ceramic manufacture, particularly alongside china clay.\u003c\/p\u003e\n\u003cp\u003eThe Wheal Martyn Trust preserves and interprets Cornwall's china clay heritage, documenting the development of the industry and its influence on the region's communities and landscape.\u003c\/p\u003e\n\u003cp\u003eMineral specimens attributed to Rostowrack therefore offer a fascinating connection between Cornwall's natural geological processes and its long history of industrial mineral extraction.\u003c\/p\u003e\n\u003cp\u003eFor collectors, these specimens represent another important aspect of Cornish mineral heritage beyond the county's internationally renowned tin and copper deposits.\u003c\/p\u003e\n\u003ch3\u003eIntention \u0026amp; Associated Chakras\u003c\/h3\u003e\n\u003cp\u003eIn traditional crystal healing practices, milky quartz is associated with gentle, balancing qualities and the symbolic properties commonly attributed to quartz.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eClarity:\u003c\/strong\u003e Traditionally associated with clear thinking, concentration and renewed perspective.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCalm:\u003c\/strong\u003e Symbolically linked with tranquillity, emotional balance and peaceful reflection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpiritual Growth:\u003c\/strong\u003e Associated with self-awareness, reflection and personal development.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrowth \u0026amp; Success:\u003c\/strong\u003e Traditionally connected with motivation, focus and working towards personal goals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBalance:\u003c\/strong\u003e Associated with harmony, patience and maintaining a grounded outlook.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eAssociated Chakras:\u003c\/strong\u003e Crown Chakra and Solar Plexus Chakra.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIntention:\u003c\/strong\u003e Calm, Spiritual Growth and Growth \u0026amp; Success.\u003c\/p\u003e\n\u003cp\u003eThese associations belong to crystal healing traditions and are not scientifically established properties of quartz.\u003c\/p\u003e\n\u003ch3\u003eNatural Formation \u0026amp; Symbolism\u003c\/h3\u003e\n\u003cp\u003eAs a naturally formed raw mineral specimen, this piece retains its irregular outline, exposed crystal faces, natural fractures and distinctive interconnected crystalline cavities.\u003c\/p\u003e\n\u003cp\u003eThe layered openings provide an attractive example of quartz crystallisation within natural geological spaces.\u003c\/p\u003e\n\u003cp\u003eIts delicate crystal-lined interiors contrast with the surrounding dense milky quartz, highlighting the different textures that can develop during mineral formation.\u003c\/p\u003e\n\u003cp\u003eThe subtle variations of cream, champagne and blush-toned staining further enhance the specimen's natural appearance.\u003c\/p\u003e\n\u003cp\u003eRaw quartz formations are traditionally associated with authenticity, clarity and connection to the natural world.\u003c\/p\u003e\n\u003cp\u003eThe multiple crystalline cavities may also be interpreted symbolically as representing hidden potential, inner reflection and the gradual development of personal understanding.\u003c\/p\u003e\n\u003cp\u003eBeyond these traditional associations, this specimen offers a beautiful example of natural mineral crystallisation and the geological diversity associated with Cornwall's granite landscapes.\u003c\/p\u003e\n\u003ch3\u003eSpecimen Details\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMineral:\u003c\/strong\u003e Milky Quartz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChemical Formula:\u003c\/strong\u003e SiO₂\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCrystal System:\u003c\/strong\u003e Trigonal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMohs Hardness:\u003c\/strong\u003e 7\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMine:\u003c\/strong\u003e Rostowrack China Clay Pit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLocality:\u003c\/strong\u003e Hendra Downs, St Dennis, Cornwall, England\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 335g\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasurements:\u003c\/strong\u003e 55.1mm × 96.5mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFormation:\u003c\/strong\u003e Natural raw quartz specimen with interconnected crystal-lined cavities\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColour:\u003c\/strong\u003e Milky white, ivory, pale champagne, cream and subtle blush-pink tones\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAssociated Features:\u003c\/strong\u003e Multiple crystalline openings, intergrown quartz crystals, natural mineral bridges and subtle mineral staining\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Natural, unpolished\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCondition:\u003c\/strong\u003e Natural mineral surfaces with irregular edges, geological fractures, delicate crystals and visible mineral staining\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e One individual specimen\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eYou will receive the exact specimen photographed. Natural mineral specimens may contain fractures, uneven surfaces, delicate crystals, inclusions and variations resulting from their geological formation.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eWooden display plinth and decorative flowers shown in the photographs are not included.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch3\u003eSources \u0026amp; References\u003c\/h3\u003e\n\u003cp\u003eThe following resources provide geological, mineralogical and historical information relating to Rostowrack China Clay Pit and the surrounding St Austell granite district:\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/www.mindat.org\/loc-1198.html\" rel=\"noopener noreferrer\" target=\"_blank\"\u003eMindat – Rostowrack China Clay Pit, Cornwall\u003c\/a\u003e. Mineral locality database providing records of the locality and its mineral occurrences.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/ussher.org.uk\/wp-content\/uploads\/journal\/1995\/24-Bristow_Howe_1995.pdf\" rel=\"noopener noreferrer\" target=\"_blank\"\u003eBristow \u0026amp; Howe (1995) – Field Excursion to the Fal Valley, Western St Austell Granite\u003c\/a\u003e. Geological field account discussing Rostowrack, altered granite and quartz vein mineralisation.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/www.csm-museum.co.uk\/downloads\/eurogr2014.pdf\" rel=\"noopener noreferrer\" target=\"_blank\"\u003eEUROGRANITES 2014 – Granites and Mineralisation of South West England\u003c\/a\u003e. Geological field guide describing Rostowrack's kaolinised granite, quartz-hematite vein and associated mineralisation.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/www.wheal-martyn.com\/china-stone\" rel=\"noopener noreferrer\" target=\"_blank\"\u003eWheal Martyn Trust – China Stone\u003c\/a\u003e. Museum resource concerning Cornwall's china stone heritage and its relationship with the china clay industry.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003csmall\u003eHistorical and geological references relate to the recorded Rostowrack locality.\u003c\/small\u003e\u003c\/p\u003e","brand":"Harpo's Angels","offers":[{"title":"Default Title","offer_id":59263027937615,"sku":null,"price":56.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1028\/1238\/5615\/files\/download_e14773cc-4cef-4e3a-9e96-ad0f70e16c24.png?v=1792955169","url":"https:\/\/harposangels.co.uk\/products\/milky-quartz-cluster-rostowrack-china-clay-pit-cornwall-no-8","provider":"Harpo's Angels","version":"1.0","type":"link"}