As a passionate supporter of the slow food movement there’s nothing I love more than learning about artisan food and the traditional techniques used to make it. So, when the guys at Salt House offered to take me on a tour of their favourite salts I jumped at the chance.

It's difficult to choose just a few salts as they are all very different and offer unique properties so we've chosen six – we probably should have had a smoked one in there somewhere, but there is always next time…

“All the great ancient civilisations, from Hebrews to Hittites, have held salt in high esteem and its value was such that the Empire of Rome used it to pay soldiers (giving rise to the word salary)”

All salt has ultimately come from the sea: rock salt is thousands of year old seawater which has been dried and trapped underground. Seawater itself is different all over the world – it even varies as you go down in depth; so as you can see how the properties of salts are dependent upon where the sea water is taken.

Location is not the only variable, however. How the salt is extracted also has implications for its character. Sea water can contain in excess of 90 different elements, so the exact point at which the extraction process starts and stops, retaining or removing different elements, is critical. The industrially processed salt we are all too familiar with, not least in our chippies and fast food outlets, has been scientifically cleared of all minerals and elements to leave 99.99% sodium chloride; this is also broadly the case with readily available processed sea salt. The procedure strips all other elements out as they can be used separately and sold on more profitably.

The first salt we recommend trying is Saltverk. This is a clear, glistening crystal which almost looks like ice, hinting at its origin. Sea water is taken from the north Arctic oceanic stream as it flows past a small peninsular in northern Iceland. The water is then evaporated using the heat from geysers. This leaves a clean, crisp tasting salt that has a light crunch and works brilliantly for a tasty tomato salad and will bring out the phenomenal flavour of smoked lamb.

The Fleur de Sel (Flower of Salt) traditionally comes from Brittany and one of our favourites has to be Brittany’s Fleur de Sel de Guerande. Salt has been produced there since at least the 4th century, but it was in the 6th or 7th century that they developed the process still used today. They draw the sea water into a single pond and then move it on when it has reached a heightened salinity. It is moved on again when it is a stronger brine and again until it reaches the final settling pond where crystals start to form. These precious crystals are then diligently hand harvested in time-honoured fashion. This salt gives a sensationally smooth taste that leaves a lovely lingering mouth-watering flavour. Just crumbling this onto a green salad will lift it to gourmet levels and any butter made with this salt alone is worth travelling for.

Now, to move on to a bolder, more eccentric and perhaps exciting salt: Agnui no Shio from one of the most southerly islands of Japan in the East China Sea. The Japanese have just started producing sea salt as in 1975 it was banned and everyone had to use the industrially processed salt with its alien implant, iodine. However, in 2002 the doors were opened for a passionate revival in sea salt made in traditional ways. The Japanese have to be resourceful as they have a high humidity which has necessarily impacted their unique production methods: sea water is pumped up a tower then gently trickled down bamboo. This encourages the water to disperse into small droplets, thereby increasing the surface area exposed to air and, in turn, increasing the amount of water that is evaporated. Once the brine has reached a specific concentration, it is boiled up to produce the final product. This salt gives a bold burst that dissipates very quickly leaving the mellow flavours of your food on your taste buds. Agnui no Shoi works particularly well with fish and rice, leaving fantastic aromatic flavours to dwell around the mouth.

Himalayan Rock Salt is probably one of the most celebrated of all the specialist salts: carved out of a mountain side in Northern Pakistan, it too, was originally sea water. Subsequently there is little or no pollution affecting it and it prides itself as being one of the freshest available. It is often marketed, although not so much in the UK, as being a health food or a purifying tonic due to the abundance of elements, its origin and wonderful pink colour. Its uses are boundless as it comes in all shapes and sizes such as an amazing block which you can cook on, and also a shot glass or a pestle and mortar which incorporates some salt as you pound. This salt encourages a particular sweetness onto the tongue whilst allowing the true flavours to flood through. In this form, its versatility is similarly broad – we would recommend for sumptuously curing venison from the highlands or adding a certain panache and depth to a curry.

This leaves us with a couple of “flavoured” salts. The “diva” of salts is Hawaiian Hot Black Lava: not for the faint-hearted, this is a traditional Hawaiian sea salt which has been infused with activated carbon. The flavour works on many punchy levels and the carbon serves to not only enhance the intestinal benefits of the salt, but also challenges the whole concept of “salt” for the consumer by the contrast in expectant colour. This is THE salt to put on pineapple! As you eat the salted pineapple, an elevated sweetness comes rushing in and, magically the often bitter and astringent note of pineapple, is oppressed then there is the final crunch down on the crystals giving a gratifying contrast of soft and hard, tantalisingly leaving you with a light, poignant, tingle from the chilli: WOW, you will never eat pineapple alone again!

Think of Sicily, the largest island in the Mediterranean where the sun beats down and the dry African winds blow past: it is ideal for producing Ravida Fennel Pollen Sea Salt. This is from the West Coast of Sicily where they have been harvesting salt for centuries. It also plays host to abundant crops of fennel. Local producers take advantage of a unique opportunity to marry the two and the strongest part of the fennel plant, the pollen is combined with freshly garnered salt crystals. The result is simple and effective: throw this onto the top of sole and put in the oven, when brought out, the aromatic fennel will cause delighted squeals and force you to pick at the fish with renewed ardour.

Each salt offers a range of trace elements which affect the flavours and dynamics of your food. The secret is to use the right salt at the right time – reducing the amount required, while ensuring that the body’s salt needs are met. Great salts are not purely sodium chloride – they bring an intriguing mix of minerals including magnesium, potassium, calcium, iron and many more besides. Get your taste buds working and enjoy.

Many thanks to all at the Salt House for their insight and the chance to try their delicious products.