Also called adularia, Mukdahan (Thai), rainbow moonstone (labradorite feldspar)
Moonstone is a feldspar with a soft floating glow called adularescence, and the Romans are said to have thought it was made of moonlight. Today people treat it as a stone of intuition, new beginnings and the feminine cycle, and use it in moon rituals.
Tonight's moon is read when the page loads.
Take care: Moonstone is fairly soft (6 to 6.5) and has easy cleavage, so a hard knock can split it; take rings off for heavy work. Never leave the candle burning unattended.
Gem histories say the Romans admired moonstone because they believed it formed from solidified moonlight, and that Greeks and Romans linked it to their moon goddesses. Later writers also said its glow changed with the phases of the moon.
Jewellers often write that moonstone is sacred in India and given at weddings for harmony. The claim is widely repeated, but no early written source for it has been confirmed here, so read it as living trade lore.
Uses: moonstone jewellery
Moonstone was a favourite of Art Nouveau jewellers, and Rene Lalique and others set it in flowing, nature-based designs where its glow suggested water and mist. In 1970 Florida named moonstone its state gem to honour the Moon landings, though it does not occur there naturally.
Moonstone is a feldspar in which orthoclase and albite separate into thin alternating layers as the mineral cools. Light scattering between layers about half a micron thick produces adularescence, the bluish glow that seems to float under the surface. The common orthoclase form, adularia, is named for Mount Adular in Switzerland. The most prized blue stones historically came from Myanmar, and most commercial moonstone today comes from Sri Lanka and India. In Thailand it shares its name with Mukdahan province on the Mekong.
Gem histories say the Romans believed moonstone was solid moonlight, and that it was linked with lunar goddesses. It flourished in Art Nouveau jewellery around 1900, and Florida made it the state gem in 1970. Modern crystal practice treats moonstone as a stone of intuition, cycles and new starts. Crystal healing has no scientific support: in a 1999 Goldsmiths experiment by Christopher French and colleagues, volunteers holding fake crystals reported the same sensations as those holding real quartz. Rainbow moonstone is actually a white labradorite, and opalite glass is often sold as moonstone; the glass glows evenly from every angle, while real moonstone shows its sheen only at certain tilts.
A full moon ritual is a simple monthly practice done at home on the night of the full moon to give thanks, release what is finished and charge water or tools in the moonlight. This is a complete solo version for beginners, separate from the Wiccan coven esbat.
A new moon ritual is a short monthly practice of setting intentions at the start of the lunar cycle, when the moon is dark. It is a modern practice with old roots in new-moon month beginnings, and this version focuses on writing clear, doable intentions.
A full moon flanked by a waxing and a waning crescent, used in modern Wicca and Paganism for the Triple Goddess as Maiden, Mother and Crone. The idea draws on ancient triple goddesses, but this form and meaning were shaped in the 20th century, above all by Robert Graves.
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