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Gemstones Found in Cornwall: A Complete Guide

Cornwall, with its rich geological history, boasts an array of beautiful gemstones, from the well-known to the rare. Explore the mesmerising world of Cornish gemstones, and uncover the secrets of this gem-filled region.

Cornish gemstones

Cornish Gemstones: A Rich Tapestry of Cornish Rocks!

Nestled within the rugged terrains and serene coastlines of Cornwall lies a world teeming with diverse and captivating gemstones. These Cornish rocks, each with its unique charm and history, paint a vivid picture of the region's geological past and cultural significance.

Cornish gemstones

Quartz and Rose Quartz

Among the most versatile gemstones, quartz appears in a variety of forms and colours, most commonly white quartz. Its pink-hued sibling, rose quartz, is associated with love and is often used in jewellery for its delicate hue.

Rock Crystal

A clear and transparent variant of quartz, rock crystal has been used in everything from jewellery to ornamental items. It's a versatile and beautiful stone.

Cornish gemstones


A member of the quartz family, chalcedony comes in a range of colours and has been a favourite for ornaments and jewellery for centuries.

Cornish gemstones


Highly esteemed for its radiant purple shade, crystalline amethyst—a variant of quartz—is occasionally discovered in Cornwall's secluded spots.

A word of caution: these hidden crystals are often found in coastal caves, which can pose potential dangers!

In crystal healing Amethyst symbolises spiritual protection and purification.

Cornish gemstones

Morion (Dark Smoky Quartz)

Morion, a dark quartz, aligns with Cornwall's rich mining heritage. Notably, the region's tin mines often housed this gemstone, along with other minerals. A dark brown to black variety of quartz, Morion is often used for its grounding properties in spiritual practices.

Kernowite: Cornwall's Rarest Mineral

Source: BBC news

Kernowite was identified as a distinct mineral in 2020 and is named after the Cornish word for Cornwall, "Kernow." It's a green mineral discovered in an old specimen that had been in the Natural History Museum's collection for over a century. Kernowite, while interesting, isn't widely used in jewellery due to its rarity.

Cornish gemstones


Found prominently in the Lizard Peninsula, serpentine has an attractive green hue and can often be polished to a high shine, making it perfect for decorative items

Cornish Minerals: From Cassiterite to China Clay Pits

Cassiterite, a rich source of tin oxide, is significant to Cornwall's granite-rich geology. The region's mineral-rich veins include tin, copper, arsenic, and silver. These minerals, along with gemstones, were historically excavated from Cornish mines, including the iconic South Crofty mine and Geevor mine.

Cornish gemstones

Fool's Gold

Although not a gemstone, fool's gold has a metallic sheen that can easily be mistaken for gold, hence its name. Pyrite is found in various geological formations, especially sedimentary rocks, and Cornwall is no exception.

Discovering Gemstones in Cornwall's Landscape

From the tar sands of certain areas to China clay pits and stone quarrying zones, Cornwall provides varied terrains for gem seekers. The Mount's Bay and West Penwith area has tales of collectors finding semi precious stones, possibly even rare amethyst.

Cornwall's varied terrain offers numerous opportunities to find crystals and gemstones:

  • Caves: With caution, venturing into some of the accessible caves on the Cornish coastline can lead to exciting finds. Safety is paramount, and it's best to go with a knowledgeable and experienced person.

  • Moorland & Farmland: The vast moorlands and freshly ploughed fields can occasionally reveal hidden gemstones, especially after agricultural activities. Always seek permission from landowners before exploring private lands.

  • Riverbeds and Streams: Flowing waters can, over time, uncover and refine gemstones, presenting them as beautiful, polished treasures in shallow streams. In some top secret locations in Cornwall it is even possible to find gold dust and tiny gold nuggets!

Formation of Valuable Gemstones in Cornwall

Cornish rocks and minerals have been millions of years in the making. The region's geological history involves tectonic plate movements, volcanic activity, and erosion, which have combined to create the diverse range of gemstones found here.

From the deep-seated granites to metamorphic rocks and mineral veins, Cornwall's geology is a testament to the Earth's dynamic processes.

The Geological Marvels of Cornwall

The interplay of metamorphic and sedimentary rocks, tectonic movements, volcanic activities, and erosion has birthed Cornwall's gemstone wealth. Places like the Lizard Peninsula and the Land's End Peninsula owe their mineral-rich stature to such geological wonders.

Cornish gemstones


Is Kernowite a valuable gemstone?

Absolutely! Given its rarity and recent discovery, Kernowite is quite precious.

Can I see Cornish gemstones when visiting Cornwall?

Yes, the Royal Cornwall Museum in Truro has an impressive collection of Cornish minerals and gemstones. Geevor tin mine also has many specimens.

Can I find Amethyst in Cornwall?

Yes, amethyst used to be found in tin mines and coastal caves, although sources than are possible to get to are few and far between now.

Are there any therapies associated with Cornish crystals?

Yes, many believe in crystal therapies. For instance, amethyst is thought to purify and protect, and quartz varieties are often associated with healing energies.


From its beaches to its moorlands, Cornwall hides a plethora of gemstones just waiting to be discovered. Each stone, with its unique history and formation process, tells a story of the Earth's magnificent journey through time.

Whether you're an avid gem collector, a jeweller, or simply someone with a passion for the Earth's treasures, Cornish gemstones are bound to captivate your imagination.

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