Selenite: Meaning, Symbolic Properties, Care

What is selenite?

Selenite is the common name, used in jewellery and amateur mineralogy, for crystals of gypsum, a mineral with the formula CaSO4·2H2O (hydrated calcium sulphate). The official classification recognises only "gypsum": "selenite" is simply a convenient name for fine transparent or pearly crystals. The word comes from the Greek selênê, "the moon", and has no connection with selenium, a chemical element that nonetheless shares the same origin.

Gypsum is the reference mineral of hardness 2 on the Mohs scale: it can be scratched with a fingernail. It forms in evaporites, that is, when the salty water of ancient lagoons evaporates, and it is more widespread than rock salt. It appears in several forms: transparent crystals, bands, satin spar (fibrous, with a silky sheen), alabaster (massive, fine and translucent, although the word is also used for some limestones), and desert roses, clusters of petal shapes formed in desert sand, notably in North Africa and the southwestern United States.

The giant crystals of Naica

In the Naica mine in Mexico, a cave discovered in 2000, about 290 metres deep, contains selenite crystals that are among the largest in the world: the longest measures about 11 metres and weighs around 12 tonnes. They grew slowly in hot water saturated with minerals. The cave, which is very hot and humid, cannot be visited without special equipment.

The crystals sold in shops come, of course, from more accessible deposits and are nowhere near that size.

Traditional symbolism

With its lunar glow, selenite is associated with light, clarity and calm. In modern esotericism it is often placed near other stones to symbolise a "cleansing": this idea rests on tradition, not on a scientific fact. It is also used as a support for meditation.

These meanings are modern uses, with no demonstrated effect. A stone does not purify places or people; it can help create a pause ritual, if that appeals to you.

Traditional correspondences

See also calm and serenity.

How to use it

• As a wand or tower: placed on a shelf or desk, it gives off a soft glow, especially in candlelight.
• As a slab or plate: other stones are placed on it for a symbolic "recharging" ritual. It serves as a base, not as a proven cleanser.
• As a lamp: some selenite lamps are carved from gypsum; check that they are electrically safe.
• As a gift: light and very white, it makes a lovely decorative object.

Browse our rough stones, selenite and geodes.

Care: the golden rule is no water

Selenite is one of the most fragile stones in the shop. Keep three points in mind.

• No water: gypsum slowly dissolves in water (about 2 g per litre at 20 °C). A wet piece loses its polish, becomes dull and eventually deteriorates. No soaking, no rinsing, no moonlight bath in a glass of water.
• Dry cleaning: dust it with a soft, dry cloth or a brush. For a stain, use a cotton pad that is very slightly damp, and wipe it off immediately.
• Impacts and scratches: hardness 2, easy cleavage: it scratches with a fingernail and breaks into flakes. Do not store it with harder stones.
• Humidity and heat: avoid bathrooms and very damp rooms. Strong heat dehydrates gypsum (this is how plaster is made, at around 120 to 130 °C); do not place it near a radiator.
• Dust: do not grate it, do not put it in your mouth, and do not make "stone water" from it.

See also the guide to cleansing and recharging your stones.

Recognising genuine selenite and avoiding surprises

Natural selenite is white, slightly translucent, with striations or a pearly sheen. It can be scratched with a fingernail.

• Coloured wands: pink, blue or green wands are dyed gypsum; this is not a natural colour. A dyed piece may rub off on your hands.
• Glass, calcite or resin: a fake is heavier, harder and cannot be scratched with a fingernail. A very smooth, very transparent wand that is unusually light may be plastic.
• Alabaster and white calcite: sometimes sold as selenite; they are harder and tolerate water better.
• Satin spar and clear selenite: these are two appearances of the same mineral, the silky fibre (satin) and the translucent crystal. Both are genuine.

Always ask whether the piece is natural or dyed. See the guide to choosing and caring for your stones.

How to choose your selenite

Choose according to use: a wand for a shelf, a plate for placing other stones on, a lamp for ambience, a desert rose for decoration. Prefer a whole piece, without cracks or chips, with a fine satiny sheen; a very thin piece is more fragile. The material is abundant and very affordable.

It pairs well with clear quartz and moonstone, two other luminous stones.

Frequently asked questions

Also read

The meanings mentioned belong to tradition and symbolism. They are neither promises of results nor medical advice. Back to Guide to stones.