Blue John – the Indigo stone of Clarity…
Crystals, gems, and stones enchant me from both a geological point of view and a healing, spiritual approach. So, when we were up in Nottingham this last weekend, Vince and I drove out to Castleton in the Peak District to visit the caverns.
Treak Cliff Cavern © Lisa Shambrook
We took an underground barge down the flooded Speedwell Cavern and learned about the lead mines and visited Peak Cavern. Peak Cavern is known as the Devil’s Arse, and is also connected to Speedwell via tunnels only accessible to potholers. We didn’t get to Blue John Cavern this time, but did go to Treak Cliff Cavern and our tour guide Katie was brilliant.
We entered via Tardis doors, because as we all know once past the tunnel going in you’ll definitely find that the caves are bigger on the inside… Treak Cliff is different from many cave systems in that moss and algae grow on the roof and walls in some spots and are encouraged as the caves also contain spiders, centipedes, and bats among other tiny wildlife. You can also see fossils adorning the walls, showing that the caves were once deep under the ocean and carved out in the Ice Age.
Blue John, Treak Cliff Cavern © Lisa Shambrook
300 years ago the original miners searched for lead, but found nothing in Treak Cliff, instead they found and disregarded a purple and yellow Calcium Fluoride (Fluorspar) running through the limestone. Its worth was later appreciated and Blue John was mined, both in Treak Cliffs and Blue John mines. This mountain is the only place in the world that Blue John is found. The caves are a Site of Special Scientific Interest and protected, and mining of Blue John is carefully monitored.
Blue John Vein, Treak Cliff Cavern © Lisa Shambrook
The miner who discovered the indigo-blue and yellow fluorite very imaginatively called it Blue and Yellow… In France they dropped the ‘and’ to make it Bleu Jaune, and back in Derbyshire without the romantic French accent it switched to Blue John and the name stuck!
Blue John Pillar, Treak Cliff Cavern © Lisa Shambrook
I loved our tour through Treak Cliff Cavern, moving into caverns full of Blue John still running through its walls, and a pillar of the fluorite worth over 9million, but unable to be mined because the pillar holds up the cavern!
We moved into caves with flowstone, stalactites, and stalagmites.
Stalactites, Treak Cliff Cavern © Lisa Shambrook
The crystalline gemstone is valuable and rare, as I said, only found in Hope Valley near Castleton, and the mined stone is sold in rough and polished specimens, and turned into exquisite jewellery, bowls, and fine ornaments. Treak Cliff has a wonderful gift shop, which includes a display of items not for sale, but gorgeous. A Blue John dragon sits inside this display…I wish I’d taken a picture of it! I also visited Silver and Stone gift shop on Goosehill Bridge to find my slice of Blue John.
I have a lovely collection of gemstones, having researched them for my current work in progress, The Seren Stone Chronicles, and purchasing a couple of pieces of Blue John was a true pleasure.
Blue John, rough and polished slice, and Calcite © Lisa Shambrook
The fluorite comes in a banded stone, yellow or white, with bands of purple crystalline. The more yellow pieces are coloured with iron ore. Sliced pieces show the gorgeous bands of purple and white. I chose a small two inch piece with intricate purple markings, which look amazing when held up to the light.
Blue John, polished slice © Lisa Shambrook
Blue John’s healing properties include clarity of mind and peace. It boosts mental, spiritual, and emotional awareness. Fluorite has many physical healing energies and Blue John has been used as an elixir to promote health and beneficial mineral absorption.
I love discovering the beauty of gems and stones, and Hope Valley’s secrets are there for all of us to discover, in a rich and striking vein of Blue John.