{"product_id":"smoky-quartz-crystal-cluster-rostowrack-china-clay-pit-cornwall-no-1","title":"Smoky Quartz Crystal Cluster | Rostowrack China Clay Pit, Cornwall |  No. 1","description":"\u003cp\u003eA beautiful 160g natural smoky quartz specimen featuring a striking arrangement of translucent champagne-grey crystals growing across a contrasting milky white quartz matrix.\u003c\/p\u003e\n\u003cp\u003eThis attractive Cornish mineral specimen combines well-defined crystal faces, delicate smoky colouring and a sculptural natural formation. Its densely intergrown crystals and contrasting textures make it an appealing piece for collectors of British quartz and natural mineral specimens.\u003c\/p\u003e\n\u003ch3\u003eSpecimen Description\u003c\/h3\u003e\n\u003cp\u003eThis distinctive specimen displays a broad cluster of smoky quartz crystals rising from a substantial pale quartz matrix, creating an attractive contrast between translucent crystalline growth and more opaque mineral material.\u003c\/p\u003e\n\u003cp\u003eThe main crystal formation consists of numerous interlocking quartz points, ranging from smaller delicate terminations to larger, more prominent crystals with clearly defined faces.\u003c\/p\u003e\n\u003cp\u003eIts colouring varies from soft champagne and pale smoky grey to slightly deeper taupe-brown tones, with areas of greater transparency allowing light to pass through the crystal faces.\u003c\/p\u003e\n\u003cp\u003eSeveral larger crystals form the centre of the specimen, surrounded by smaller quartz points that create a densely layered and naturally irregular surface.\u003c\/p\u003e\n\u003cp\u003eThe individual crystals display a mixture of smooth, glassy faces, angular terminations and subtle internal cloudiness. Their overlapping growth produces an intricate arrangement of reflections when viewed under changing light.\u003c\/p\u003e\n\u003cp\u003eAlong the lower portion of the specimen, the smoky quartz transitions into a predominantly milky white matrix with a more compact, opaque appearance. This provides a striking visual contrast against the translucent crystals above.\u003c\/p\u003e\n\u003cp\u003eViewed from the sides, the specimen reveals further crystal development and a gently uneven profile, while the larger smoky quartz points provide an attractive focal feature.\u003c\/p\u003e\n\u003cp\u003eIts natural shape, delicate colouring and clearly visible crystalline structure make this an excellent specimen for collectors interested in quartz morphology and Cornish mineral heritage.\u003c\/p\u003e\n\u003ch3\u003eAbout the Mineral\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eSmoky Quartz (SiO₂)\u003c\/strong\u003e is a naturally occurring colour variety of quartz, belonging to the trigonal crystal system and possessing a Mohs hardness of 7.\u003c\/p\u003e\n\u003cp\u003eIts characteristic smoky colouring ranges from pale grey and champagne-brown to deep brown or almost black.\u003c\/p\u003e\n\u003cp\u003eThe colour develops through natural irradiation affecting certain aluminium-related defects within the quartz crystal structure. These colour centres selectively absorb light, producing the characteristic smoky appearance.\u003c\/p\u003e\n\u003cp\u003eSmoky quartz commonly develops in geological environments associated with granitic rocks, hydrothermal mineralisation and quartz-bearing veins.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMilky Quartz\u003c\/strong\u003e is another descriptive variety of quartz, characterised by its cloudy white appearance. This is commonly caused by numerous microscopic fluid inclusions or other internal features that scatter light.\u003c\/p\u003e\n\u003cp\u003eIn this specimen, the contrast between the translucent smoky crystals and the pale milky quartz matrix illustrates variations in the appearance of quartz within a single natural formation.\u003c\/p\u003e\n\u003cp\u003eThe crystals display characteristic quartz morphology, including prismatic growth and angular terminations. Their intergrown arrangement reflects successive or overlapping crystal development within the original geological environment.\u003c\/p\u003e\n\u003ch3\u003eCornish Geological \u0026amp; Mining Heritage\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eCornwall\u003c\/strong\u003e is internationally recognised for its remarkable geological diversity and extensive history of mineral extraction.\u003c\/p\u003e\n\u003cp\u003eThe county's mineral wealth is closely associated with the emplacement of granite bodies during the late stages of the Variscan mountain-building period, approximately 300 million years ago.\u003c\/p\u003e\n\u003cp\u003eThese granite intrusions and the circulation of mineral-bearing fluids contributed to the development of numerous mineral veins and deposits throughout the region.\u003c\/p\u003e\n\u003cp\u003eAlthough Cornwall is particularly celebrated for tin and copper mining, its geological environments have also produced a wide variety of collectible minerals, including quartz, fluorite, tourmaline, cassiterite and numerous metallic ore minerals.\u003c\/p\u003e\n\u003cp\u003eQuartz occurs throughout Cornwall in several forms, including clear rock crystal, milky quartz, smoky quartz and amethystine varieties.\u003c\/p\u003e\n\u003cp\u003eIn granitic and hydrothermal environments, quartz may crystallise within fractures, cavities and veins as silica-bearing fluids circulate through the surrounding rock.\u003c\/p\u003e\n\u003cp\u003eThe St Austell granite district is particularly associated with Cornwall's historic china clay industry, where the alteration of feldspar-rich granite produced extensive kaolin deposits.\u003c\/p\u003e\n\u003cp\u003eMineral locality records document quartz, including smoky quartz, from several Cornish workings associated with granite and china clay extraction.\u003c\/p\u003e\n\u003cp\u003eOne such locality is Rostowrack China Clay Pit at Hendra Downs, near St Dennis, where recorded mineral specimens include quartz with smoky and amethystine colouring.\u003c\/p\u003e\n\u003ch3\u003eIntention \u0026amp; Associated Chakras\u003c\/h3\u003e\n\u003cp\u003eIn traditional crystal healing practices, smoky quartz is associated with grounding, protection, emotional stability and the release of unwanted energy.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrounding:\u003c\/strong\u003e Traditionally associated with stability, connection to the present moment and emotional balance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtection:\u003c\/strong\u003e Symbolically connected with personal boundaries, resilience and a sense of security.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCalm:\u003c\/strong\u003e Often used as a focus for relaxation, reflection and releasing emotional tension.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClarity:\u003c\/strong\u003e Quartz is traditionally associated with mental focus, perspective and clear intention.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eAssociated Chakras:\u003c\/strong\u003e Root Chakra and Solar Plexus Chakra.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIntention:\u003c\/strong\u003e Protection, Calm and Grounding.\u003c\/p\u003e\n\u003cp\u003eThese associations belong to crystal healing traditions and are not scientifically established properties of smoky 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 original crystalline surfaces, irregular structure and exposed mineral matrix.\u003c\/p\u003e\n\u003cp\u003eThe arrangement of multiple smoky quartz crystals growing together creates a distinctive formation that reflects the natural processes involved in crystal development.\u003c\/p\u003e\n\u003cp\u003eWithin traditional crystal symbolism, smoky quartz is associated with strength, grounding and transformation, while its transparent and translucent crystal faces are often linked with clarity and perspective.\u003c\/p\u003e\n\u003cp\u003eThe contrast between the darker smoky quartz and pale milky matrix provides a beautiful symbolic representation of balance between stability and openness.\u003c\/p\u003e\n\u003ch3\u003eSpecimen Details\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMineral:\u003c\/strong\u003e Smoky Quartz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChemical Formula:\u003c\/strong\u003e SiO₂\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLocality:\u003c\/strong\u003e Cornwall, England\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecific Mine:\u003c\/strong\u003e Rostowrack China Clay Pit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 160g\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasurements:\u003c\/strong\u003e 84.1mm × 44.7mm\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\u003eFormation:\u003c\/strong\u003e Natural smoky quartz crystal cluster on milky quartz matrix\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColour:\u003c\/strong\u003e Champagne grey, smoky brown, translucent taupe and milky white\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 crystalline surfaces, irregular edges, intergrown crystal points and internal 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 crystal points, inclusions and variations resulting from their geological formation.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eDisplay stand shown in the photographs is not included.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch3\u003eSources \u0026amp; References\u003c\/h3\u003e\n\u003cp\u003eThe following resources document the geological setting, mineral occurrences and industrial heritage of Cornwall. \u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/www.mindat.org\/gl\/1198\" rel=\"noopener noreferrer\" target=\"_blank\"\u003eMindat – Rostowrack China Clay Pit, Cornwall\u003c\/a\u003e. Mineral locality record including documented smoky quartz specimens from Hendra Downs, St Dennis.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/www.mindat.org\/loc-18527.html\" rel=\"noopener noreferrer\" target=\"_blank\"\u003eMindat – St Dennis, Cornwall\u003c\/a\u003e. Regional mineral locality information documenting quartz and associated mineral occurrences.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/www.wheal-martyn.com\/our-museum\" rel=\"noopener noreferrer\" target=\"_blank\"\u003eWheal Martyn Trust – Museum \u0026amp; China Clay Heritage\u003c\/a\u003e. Museum history documenting Cornwall's china clay industry and its importance to the St Austell district.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/historicengland.org.uk\/listing\/the-list\/list-entry\/1003265\" rel=\"noopener noreferrer\" target=\"_blank\"\u003eHistoric England – Wheal Martyn China Clay Works\u003c\/a\u003e. Official heritage designation describing the historical development and industrial significance of Cornish china clay extraction.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/www.cornwallheritagetrust.org\/timeline\/industry-in-cornwall\/\" rel=\"noopener noreferrer\" target=\"_blank\"\u003eCornwall Heritage Trust – Industry in Cornwall\u003c\/a\u003e. Historical overview of Cornwall's china clay industry and its development.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003csmall\u003eHistorical and geological references relate to Cornwall's documented mineral localities and regional mining heritage. \u003c\/small\u003e\u003c\/p\u003e","brand":"Harpo's Angels","offers":[{"title":"Default Title","offer_id":59262343774543,"sku":null,"price":28.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1028\/1238\/5615\/files\/download_7e8715b9-0212-4082-8ce9-a138be417e21.png?v=1792951065","url":"https:\/\/harposangels.co.uk\/products\/smoky-quartz-crystal-cluster-rostowrack-china-clay-pit-cornwall-no-1","provider":"Harpo's Angels","version":"1.0","type":"link"}