Collection: Selenite

Selenite: fourteen pieces, $4.95 to $119.95

Selenite is gypsum — calcium sulfate that crystallized out of ancient seas and lakes as they dried. That single fact explains everything unusual about owning it. Gypsum is 2 on the Mohs scale, softer than your own fingernail, and it is soluble in water. So the stone that the whole tradition uses to cleanse other stones is the one stone you must never cleanse with water. Almost every piece here comes from Morocco, which supplies most of the selenite in circulation; the peach pocket sphere is sourced from Morocco and Mexico. What follows is the buying side: the naming, what the price actually buys, and how not to damage it. For the wider rule this stone is the headline example of, see which crystals cannot go in water.

Selenite or satin spar: what you are actually buying

This is the most common worry US buyers arrive with, usually after reading that they have been sold the wrong thing. They have not. Selenite and satin spar are the same mineral. The two names describe crystal habit — the shape the gypsum grew in — and nothing else:

• True selenite grows as transparent, glassy plates you can very nearly read through. It splinters along its cleavage planes and rarely survives cutting and shipping, so it mostly stays rough and mostly stays with collectors.
• Satin spar grows as tightly packed parallel fibers. Those fibers produce the silky band of light that travels along a bar when you turn it, the same optical effect that makes a cat's-eye. It is marginally tougher, takes a polish, and survives being shaped.

Which means that essentially every polished tower, sphere, plate, bowl and lamp on the market — including all of them here — is satin spar sold under the name selenite. That is trade convention, not deception, and it is worth saying plainly rather than letting you find out from a video later. Nothing about the chemistry, the softness, the water problem or the traditional use differs between them. If you want the wider version of this question, real vs. treated crystals covers how to tell what you are actually buying across the rest of the shelf.

What the price buys, and it is mostly mass

Selenite is abundant and cheap to quarry, so unlike amethyst or tourmaline you are not paying for rarity or color grade. You are paying for how much of it there is, how much cutting waste the shape cost, and whether there is a lamp inside. Set against weight, the range here is unusually flat — and it flattens out some assumptions:

Two things fall out of that. The 6 cm sphere is the cheapest crystal per gram on the page and the 8 cm sphere is roughly twice the price per gram for the same stone, because the block it comes out of is the scarce part. And the lamps are not the markup you would expect: at $0.070 and $0.075 per gram they sit alongside the plain polished spheres, with the walnut base and the LED unit effectively included. Whether that is good value depends entirely on whether you want light.

The two rough bars, and why the cheaper one is longer

This trips people up at checkout, so it is worth being explicit. The $18.95 bar measures 1" × 1" × 11.5" and weighs 330 g. The $30.95 bar, the one labeled large, is 9" long — two and a half inches shorter — but 2.5" × 1" in cross-section and around 700 g. So "large" here means twice the mass and more than twice the width, not more length.

Choose on the job, not the label. If you want to draw a line — along the back of an altar, a windowsill, a threshold — the longer $18.95 bar does it better and costs less. If you want one object with presence, something with enough bulk to be the anchor of the arrangement rather than part of it, the $30.95 bar is the one. Both are unpolished, so both show the fibrous grain and both shed a little at the ends.

Choosing a form

• To carry: the 3-inch stick at $4.95, or the peach pocket sphere at $5.95 — naturally peach-tinted gypsum, and the only warm-toned piece here. Bear in mind that a stone this soft will scuff in a pocket with keys.
• To anchor an altar: the small obelisk (3-6 cm, 95 g, $6.95) for a marked center point, or the large rough bar at $30.95 for weight. Towers are the traditional center of a grid — how to make a crystal grid sets out the layouts.
• As a base for other stones: the 10 cm charging plate, $9.95, in square, hexagon or round. Check the size against what you own before you buy.
• To look at: the 6 cm sphere ($9.95, one palm) or the 8 cm ($36.95, two hands and a stand — at that weight, use one). The 6-inch bowl at $55.95 is thin enough to glow when a candle sits near it. More shapes across the shop are in Spheres & Pyramids.
• Lit: four lamps, $49.95 to $119.95. The Cleansing Lamp is the entry point; the Cleanse-All is close to a kilogram of stone; the Two-Tower is cut from a single block; the Hamsa lamp pairs selenite with a hamsa hand for a bedside. The rest of the lit pieces are in Crystal Lamps.

If you are weighing a tumbled stone against a point against a tower in general, crystal shapes explained covers what each form is conventionally used for.

What it is used for

Selenite's role in modern crystal practice is narrow and consistent: it is the clearing stone, the one others are laid on or beside. That is why the charging plate and the flat bar exist as product categories at all. It is conventionally associated with the crown and third-eye centers — see the crown chakra — and the peach variety is additionally linked to the sacral. In room practice it tends to be used as the quiet, permanent fixture rather than the active tool: laid along a threshold, left on a windowsill, set at the center of a grid. How to cleanse crystals and how to charge crystals both cover where selenite fits against moonlight, smoke and sound; how to cleanse a room and cleansing a secondhand object cover the room-scale version. These are traditional practices, not treatments, and nothing here is a medical device.

Care: dry, dusted, and off the windowsill

Three rules cover it. Never water, never salt water — dust with a dry cloth and nothing else. Keep it off wet rooms and open windows: sustained humidity and condensation do the same job as a rinse, only slower, which is why bathroom shelves are where selenite quietly goes chalky. And expect marks, because at Mohs 2 a fingernail, a ring or a key will score it, and a short fall onto tile will chip or shatter a sphere. Use a stand for the 8 cm sphere and a felt pad under the wooden lamp bases. Unlike amethyst, sunlight is not the enemy here — the stones that fade are a different list — but a sunny sill usually means an openable window, which brings you back to moisture. If a piece does break, what it means when a crystal breaks covers both the practical and the traditional reading.

Selenite sits next to the harder end of the shelf in Quartz, and the full range is in Crystals & Stones. Smaller pieces to carry are in Tumbled & Pocket Stones, and everything under ten dollars is in Under $10.

Frequently asked questions