Choose a letter, pick a stone from the list, and read about it: what it is made of, how hard it is, what it looks like, what it has traditionally been said to do, and how to look after it.

450 minerals

Iolite

The Violet Compass of the Vikings

Also known as: Cordierite, Viking Compass Stone

About the stone

Iolite crystal — Photo: David Abercrombie, CC BY-SA 2.0, via Wikimedia Commons

Iolite is the violet-blue gemstone variety of cordierite, notable for strong pleochroism—showing different colors when viewed from different directions. Its name comes from the Greek ios, meaning “violet.” Although used as an adornment long before modern mineral classification, cordierite was formally recognized in 1813 from specimens found near Níjar, Spain, and named in honor of French geologist Louis Cordier. Important sources include India, Sri Lanka, Madagascar, Myanmar, and Brazil. Other names include dichroite, the misleading historical trade name water sapphire, and the folklore nickname Viking Compass Stone. According to legend, Viking navigators used thin slices to help locate the Sun on cloudy days.

Mineral data

Chemical composition: Iolite is the gem variety of cordierite, a magnesium iron aluminum cyclosilicate, with the formula (Mg,Fe)₂Al₄Si₅O₁₈.
Hardness: 7 to 7.5 on the Mohs scale.
Color: Violet-blue to blue, showing strong pleochroism, with different colors from different angles.

Metaphysical data

Iolite, recognized as a violet stone of vision and possibly the legendary Viking Sunstone, has been utilized in metaphysical practices to open the inner eye, support true self-expression and clear stagnant bonds.

Guiding and Clearing Energy

Iolite may have been the Viking Sunstone of legend, and its shifting colors are felt to help one find direction when the way is unclear.
It clears negative thought forms from the mind, allowing growth and releasing fear, much like clouds parting to show a guiding sun.

Emotional Healing

The stone is often used to promote the free expression of the true self without fear of judgement from others.
In relationships, it clears resentment, bitterness and stagnation, and helps those with codependency take responsibility for themselves and speak the truth.

Harmonizing Energy Centers

Iolite is associated with the third eye and crown chakras, where it is thought to awaken intuition, inner vision and a link to higher powers.
It is a stone of visions, believed to help the user connect with guidance beyond the everyday world.

Zodiac Associations

Iolite is linked with Taurus, Libra and Sagittarius, signs whose appreciation of beauty, balance and truth is believed to match this stone's vision.
Its vibration is associated with the number 7, the number of reflection, introspection and spiritual insight.

Spiritual Growth

Iolite is a stone of visions and of connecting with higher powers, suited to meditation, journeying and contemplation under the sky.
Its pleochroism, showing different colors from different angles, is thought to remind the user that every situation can be seen from more than one side.

Physical Healing

Iolite is traditionally associated with weight loss, detoxifying and healing from addictions, though it is not a substitute for professional medical advice or treatment.
Anyone facing addiction or health concerns is encouraged to seek qualified support, using the stone only as a quiet companion for intention.

Care and handling

Iolite is fairly hard but has distinct cleavage, so it can chip if struck. Clean it with lukewarm water, mild soap and a soft brush, then dry it. Avoid ultrasonic cleaners and steam for included or fractured pieces, and sudden temperature changes. Store it apart from harder gems. Its color is generally stable in light.

Individual experiences with Iolite vary, and its effects are personal. Approach it with an open mind, use it mindfully to find your inner direction, and trust your own intuition.