{"product_id":"milky-quartz-cluster-rostowrack-china-clay-pit-cornwall-no-7","title":"Milky Quartz Cluster | Rostowrack China Clay Pit, Cornwall |  No. 7","description":"\u003cp\u003eA beautiful 335g Cornish milky quartz specimen featuring a naturally formed crystalline cavity, delicate intergrown quartz crystals and subtle cream and blush-toned mineral staining, originating from Rostowrack China Clay Pit at Hendra Downs, near St Dennis, Cornwall.\u003c\/p\u003e\n\u003cp\u003eThis distinctive raw mineral specimen combines intricate natural crystallisation with the geological heritage of Cornwall's historic 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 a gently rising profile and an abundance of finely crystallised surfaces.\u003c\/p\u003e\n\u003cp\u003eThe specimen is predominantly creamy white, with subtle variations of ivory, pale champagne and soft blush-pink tones. Delicate beige and reddish-brown staining occurs across selected areas, creating gentle contrasts throughout the mineral.\u003c\/p\u003e\n\u003cp\u003eIts most distinctive feature is a natural crystalline cavity situated towards the centre of the specimen.\u003c\/p\u003e\n\u003cp\u003eThis opening reveals a collection of small, translucent to milky-white quartz crystals, their individual faces reflecting light within the recessed formation.\u003c\/p\u003e\n\u003cp\u003eThe cavity is surrounded by densely intergrown quartz, creating an attractive contrast between the more compact outer surfaces and the delicate crystalline structures within.\u003c\/p\u003e\n\u003cp\u003eAcross the main face, numerous small quartz crystals form an almost sugary texture. Their closely packed surfaces produce a subtle sparkle when viewed under directional lighting.\u003c\/p\u003e\n\u003cp\u003eSome sections exhibit a softly frosted appearance, while others reveal brighter, more translucent crystal faces with a characteristic vitreous lustre.\u003c\/p\u003e\n\u003cp\u003eThe upper portion contains gentle variations in crystal size and orientation, with several slightly larger formations emerging from the surrounding crystalline material.\u003c\/p\u003e\n\u003cp\u003eAlong the sides, the specimen reveals additional mineral growth, irregular edges and naturally developed textures.\u003c\/p\u003e\n\u003cp\u003eThe reverse displays areas of pale quartz with subtle pinkish and beige mineral staining, preserving the specimen's natural geological character.\u003c\/p\u003e\n\u003cp\u003eIts broad, compact shape makes it particularly suitable for display, while the central crystalline opening offers an interesting feature for closer examination.\u003c\/p\u003e\n\u003cp\u003eWeighing 335g and measuring approximately 59.2mm × 75.4mm, this specimen would make a lovely addition to a collection of Cornish minerals, British quartz or naturally crystallised geological specimens.\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\u003eQuartz is one of the most widespread minerals in the Earth's continental crust and occurs in numerous geological environments, including igneous rocks, metamorphic rocks and hydrothermal mineral veins.\u003c\/p\u003e\n\u003cp\u003eIt commonly forms when silica-bearing fluids circulate through fractures and cavities within rocks. As temperature, pressure and chemical conditions change, dissolved silica may precipitate and gradually develop into quartz crystals.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMilky Quartz\u003c\/strong\u003e is a naturally occurring variety of quartz recognised by its cloudy-white or opaque appearance.\u003c\/p\u003e\n\u003cp\u003eThis distinctive colouration is commonly caused by microscopic fluid inclusions trapped within the crystal structure during mineral growth.\u003c\/p\u003e\n\u003cp\u003eThese tiny inclusions scatter incoming light, producing the characteristic milky appearance.\u003c\/p\u003e\n\u003cp\u003eThe degree of transparency can vary within an individual specimen, resulting in combinations of opaque white quartz and more translucent crystal faces.\u003c\/p\u003e\n\u003cp\u003eMilky quartz may develop as massive vein material, individual crystals or complex intergrown crystalline aggregates.\u003c\/p\u003e\n\u003cp\u003eIn this specimen, the quartz forms a densely crystallised mass containing a natural opening lined with smaller crystals.\u003c\/p\u003e\n\u003cp\u003eSuch cavities provide space for individual crystal faces to develop, allowing the characteristic geometry of quartz to become more visible.\u003c\/p\u003e\n\u003cp\u003eThe surrounding compact quartz contrasts with the delicate crystals within the opening, illustrating variations in crystal growth across the specimen.\u003c\/p\u003e\n\u003cp\u003eQuartz is particularly significant within Cornwall's granite districts, where it occurs in mineralised veins, fractures and associations with numerous other minerals.\u003c\/p\u003e\n\u003cp\u003eThe St Austell granite district is especially notable for its extensive history of hydrothermal alteration, granite mineralisation and industrial mineral extraction.\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 important industrial mineral resources.\u003c\/p\u003e\n\u003cp\u003eChina clay extraction played a major role in the industrial development of the St Austell area, supplying raw materials for porcelain, ceramics, paper manufacture and numerous other industries.\u003c\/p\u003e\n\u003cp\u003eUnlike Cornwall's more widely recognised tin and copper mines, the china clay industry concentrated primarily on extracting and processing altered granite.\u003c\/p\u003e\n\u003cp\u003eHowever, the geological processes affecting the St Austell granite also produced quartz veins, mineralised fractures and a diverse range of associated minerals.\u003c\/p\u003e\n\u003cp\u003eRostowrack is a particularly interesting locality because its granite exposures and mineralised structures have been described in published geological 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 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 features demonstrate the importance of quartz mineralisation within the locality and provide geological context for specimens attributed to Rostowrack.\u003c\/p\u003e\n\u003cp\u003eMineralogical locality records also document quartz, hematite, fluorite, kaolinite and other minerals from Rostowrack.\u003c\/p\u003e\n\u003cp\u003eThese occurrences reflect the complex geological history of granite crystallisation, hydrothermal activity and subsequent mineral alteration within the St Austell district.\u003c\/p\u003e\n\u003cp\u003eRostowrack also has historical connections with Cornwall's china stone industry.\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 importance of these industries to the county's economy 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\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 crystalline structure.\u003c\/p\u003e\n\u003cp\u003eThe central cavity provides a particularly attractive example of quartz crystallisation within a natural geological opening.\u003c\/p\u003e\n\u003cp\u003eIts delicate crystal-lined interior contrasts with the surrounding dense milky quartz, highlighting the varied textures that can develop during mineral formation.\u003c\/p\u003e\n\u003cp\u003eThe subtle variations of cream, champagne and blush-toned mineral staining further enhance the specimen's individual character.\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 naturally enclosed crystalline cavity may also be interpreted symbolically as representing inner reflection, hidden potential and gradual personal development.\u003c\/p\u003e\n\u003cp\u003eBeyond these traditional associations, this specimen offers a beautiful example of the mineralogical 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 59.2mm × 75.4mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFormation:\u003c\/strong\u003e Natural raw quartz specimen with crystalline cavity\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColour:\u003c\/strong\u003e Milky white, ivory, pale champagne and subtle blush-pink tones\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAssociated Features:\u003c\/strong\u003e Natural crystalline opening, intergrown quartz crystals, fine crystalline surfaces 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, irregular edges, geological fractures and mineral inclusions\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":59263012798799,"sku":null,"price":48.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1028\/1238\/5615\/files\/download_8fcb6e0e-3519-4283-a767-cd2cf01b55cd.png?v=1792954889","url":"https:\/\/harposangels.co.uk\/products\/milky-quartz-cluster-rostowrack-china-clay-pit-cornwall-no-7","provider":"Harpo's Angels","version":"1.0","type":"link"}