Crystals
Selenite is gypsum, Mohs 2, used for clearing, calm, cleansing other stones. The mineralogy, whether it is safe in water and sunlight, what gets substituted for it, and what a stone can honestly do.
Start with the mineralogy, because most of the bad advice about this stone follows from not knowing it. Selenite is gypsum. On colour: None. The white is internal fibres scattering light, not pigment.
Where it comes from: Morocco is the source of almost all the sticks and lamps on sale. The largest crystals ever found are in a cave in Chihuahua, Mexico, some of them eleven metres long.
| Property | Value |
|---|---|
| Mineral species | Gypsum |
| Chemical formula | CaSO4 2H2O |
| Mohs hardness | 2 |
| Crystal system | Monoclinic |
| Chakra | Crown |
| Usually linked to | Cancer, and to the Moon |
Hardness matters more than it sounds. The Mohs scale runs from talc at 1 to diamond at 10, and anything below about 5.5 can be scratched by ordinary window glass or by the quartz dust in everyday grit. At 2, selenite is soft enough to damage in a pocket with keys or in a bowl with other stones. Keep it separate.
Used more as a tool than as a stone in its own right: the usual practice is to rest other crystals on a selenite slab to clear them. It is also the one people keep by the bed, and at Mohs 2 it is soft enough to mark with a fingernail.
In the shorthand most shops and books use, it is a Crown stone, and the three words attached to it most often are clearing, calm, cleansing other stones.
This is the section that matters, and the one most pages get wrong. Cleansing advice is handed around as though every stone were the same mineral, and it is not. Here is what selenite will actually survive.
| Method | Safe? | Why |
|---|---|---|
| Water | No | Never in water. |
| Direct sunlight | Yes | Direct sunlight does no damage. |
| Salt or salt water | No | No salt, dry or dissolved. It is abrasive and it attacks softer and porous stones. |
| Moonlight | Yes | Harmless to every stone on this list, which is most of why it is the method that suits everything. |
| Smoke, sound or breath | Yes | Nothing physical touches the stone, so nothing can be damaged by it. |
Sold under several names for the same mineral: satin spar is the fibrous white material almost all lamps and sticks are cut from, while true selenite is the transparent variety. Shops use the words interchangeably. It is the same species either way, and the price difference is mostly marketing.
Two general rules that hold across the whole shop. If the price is far below everything else on the shelf of that size, something has been substituted or treated. And a stone sold with no locality at all is usually one the seller cannot trace, which in this trade often means tumbled, dyed and bagged somewhere a long way from where it came out of the ground.
Selenite is usually linked to Cancer, and to the Moon. Worth being straight about this: crystal and zodiac pairings are modern, they are not consistent between sources, and two reputable books will give you two different signs for the same stone. They are a useful organising idea rather than a tradition with a single lineage behind it.
If you want the part of this that does have a fixed method behind it, the Sun in Cancer sets out what that sign actually describes, and it is calculated from a date rather than assigned by a writer.
Every piece of selenite in the shop is the same stone with the same associations, which is both the appeal and the limit of it. A birth chart is the opposite: it is calculated from your date, time and place and it describes one person. If you do not know your birth time, this covers how to find it.
No. Selenite is a hydrated calcium sulfate and it dissolves in water.
No. Sunlight does not damage it.
Clearing, calm, cleansing other stones. It is associated with the Crown chakra.
Mohs 2. That is soft, so keep it away from keys, grit and harder stones.
Sold under several names for the same mineral: satin spar is the fibrous white material almost all lamps and sticks are cut from, while true selenite is the transparent variety.
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