Aegirine
Glossy black-green prism crystals named after the Norse sea god – a protective stone in crystal lore.

Crystal Guide · Crystals by purpose
Black tourmaline, obsidian, jet and other protection stones have been carried as protective amulets for centuries. In crystal traditions they are associated with shielding negativity and feeling safe and grounded.
Place one by your front door, carry a tumbled stone, or pair it with white sage or palo santo for a traditional cleansing ritual.
Glossy black-green prism crystals named after the Norse sea god – a protective stone in crystal lore.
Banded chalcedony formed layer by layer inside volcanic cavities – a classic grounding and balancing stone.
A gem that flashes green and brown-orange from different angles – named after Andalusia, Spain.
Small rounded nuggets of obsidian that glow smoky-brown when held to the light – a stone of comfort in crys...
Natural volcanic glass with razor-sharp edges – a classic protective, grounding stone.
Striated black crystals of schorl – the most popular protection and grounding stone in crystal lore.
Dark brown stone with a bronze metallic shimmer – a grounding crystal lore stone of confidence.
Andalusite with a natural dark cross inside – the traditional 'cross stone' of protection.
Hard golden-green gem famed for its 'cat's eye' variety – parent mineral of alexandrite.
Brown chalcedony with flashes of iridescent fire – an intense, energising stone from Mexico and the US Sout...
Black volcanic glass with a golden shimmer – a protective, insightful variety of obsidian.
The blue-grey form of tiger's eye with a silky moving shimmer – a crystal lore stone of focus and insight.
Dark grey-brown stone with a coppery shimmer – a grounding stone in crystal lore.
Lightweight black fossilised wood made famous by Victorian mourning jewellery – a traditional protective st...
Grey feldspar that flashes blue, green and gold – the 'northern lights' stone of transformation and intuition.
Norway's national rock – dark grey stone that flashes silvery blue, used from jewellery to building façades.
Volcanic glass swirled black and red-brown by iron – an earthy, grounding variety of obsidian.
Bold banded green copper mineral that decorated Russian palaces – a crystal lore stone of transformation.
Pyrite's paler, spikier twin – and the surprise behind most 'marcasite' jewellery.
One of the oldest rocks on Earth, from Greenland, flashing with golden and blue light – a protective stone.
Parallel-banded chalcedony prized for cameos since antiquity – a crystal lore stone of strength and self-co...
Brassy 'fool's gold' that grows in natural perfect cubes – the crystal lore stone of abundance and confidence.
Black volcanic glass with hidden bands of iridescent colour from Mexico – a joyful, protective stone.
Banded chalcedony in layers of red-brown sard and white onyx – an August birthstone carved into Roman seals...
Ancient carbon-rich black rock from Karelia, Russia – popular in crystal lore for protection and purification.
Brown to smoky-grey quartz darkened by natural radiation – Scotland's national gem and a grounding stone.
Crystals that naturally grow as crosses – the legendary 'fairy cross' of Virginia and Brittany.
Rich royal-purple stone discovered in Japan and found in gem quality mainly in South Africa.
Clear quartz threaded with black tourmaline needles – combining two of crystal lore's favourite stones.
Sky-blue copper phosphate and December birthstone, treasured by ancient Egypt, Persia and Native American c...
Warm mustard-yellow jasper – an everyday stone of positivity and steady energy.
Zodiac, chakra and purpose associations come from crystal-lore traditions and vary between authors. Crystals are not a substitute for medical advice.