Moonstone: The Stone That Wouldn't Stay Out of Fashion

The first time you see a fine moonstone in good light, the visual effect doesn't register as a property of a rock. The blue-white flash that moves across the surface as the stone is tilted looks like something happening on the surface of liquid mercury, or in the depths of an opal, or somewhere underwater. The effect is called adularescence, named for Mount Adula in the Swiss Alps where moonstone was first studied in the eighteenth century. It is, technically, a Schiller phenomenon produced by light scattering between sub-microscopic layers of two slightly different feldspar minerals stacked inside the stone. It is, perceptually, more or less a small piece of moonlight that someone has somehow worked into a setting.

This is the visual fact on which everything else about moonstone depends.

What I find worth saying about moonstone in 2026, after roughly six thousand years of human relationship with the stone and a particularly busy current revival, is that the stone's resilience as a piece of jewellery is best explained by the fact that the moonstone visual effect cannot be reproduced by anything else. Opals do something rainbow-coloured. Labradorite does something darker and metallic. Pearls have their own optical character that no other stone shares. Moonstone is the only mineral on earth that does the cool blue floating-light effect, and as a result, every time it has been declared out of fashion, it has come back. It is, more or less, a stone that wouldn't stay out of fashion because nothing else can do its job.

This is the story of how it kept coming back.

What it is

Moonstone is a variety of orthoclase feldspar, with the chemical formula KAlSi₃O₈. Its optical character (the blue or white flash that gives it its name) comes from a layered internal structure. As the stone crystallised over millions of years, alternating microscopic layers of orthoclase and a second feldspar mineral, albite, formed inside it. When light enters the stone, those layers scatter and diffract it, producing the floating blue-white sheen that appears to move as the stone is tilted. The Schiller phenomenon is the same physical process that produces the colour in butterfly wings, peacock feathers, and oil films on water.

The hardness is 6 to 6.5 on the Mohs scale, which is lower than sapphire (9) or quartz (7) and means moonstone needs slightly more care than the harder gem-quality stones. It is suitable for daily wear in rings if set protectively, and entirely fine for everyday wear in earrings and pendants. It will scratch against diamond, sapphire, or topaz, so should not be stored against harder stones.

The premium variety is "blue sheen moonstone," which produces the most pronounced and characteristically blue flash. This is the colour the Sri Lankan deposits produce. Other varieties include "rainbow moonstone" (which despite the name is actually labradorite, a different feldspar with multicoloured flash, much paler body), "peach moonstone," "grey moonstone," and "black moonstone" (a darker body colour with the same blue sheen). All come from the orthoclase-albite layered structure.

Sources include Sri Lanka (the historical premium origin), Southern India, Madagascar, Myanmar (Burma), Tanzania, Brazil, and parts of the United States including Virginia. Sri Lankan blue sheen moonstone in fine quality remains the benchmark and the most expensive variety, with fine cabochons over five carats reaching £400 to £1,200 per stone in 2026.

The Indian and Roman traditions

Moonstone's name in nearly every language that has had a word for it connects the stone to the moon. The Sanskrit chandrakanta means "beloved by the moon." Roman sources called it lapis lunaris. Medieval European sources called it lunatic stone or Adularia (after the Swiss origin). The visual association is direct and ancient.

In Indian gem tradition, moonstone is one of the sacred stones, considered to be solidified moonbeams that fell to earth during particular astronomical alignments. The belief is recorded in Sanskrit texts from at least the eighth century CE and was substantially older in oral tradition. Moonstone has been worn for centuries by Hindu and Buddhist practitioners as a stone of intuition, feminine spiritual energy, and dream work. The Sri Lankan trade in moonstone, which goes back to the Roman era, has been continuous: caravans from Sri Lanka carried moonstone to Greco-Roman Egypt during the early empire, and Sri Lankan moonstone fragments have been excavated from Roman archaeological sites as far north as Britain.

In the Roman and Greek traditions, moonstone was associated with the lunar goddesses Artemis and Diana. The stone was considered a protective amulet for travellers at night and was particularly worn by women, in keeping with the Roman gender-coding of lunar imagery. The same associations persist in modern moonstone marketing, which is a continuous tradition of unusual longevity.

Art Nouveau and the great revival

The transformative moment for moonstone in European jewellery is the period between approximately 1890 and 1910, the heart of the Art Nouveau movement. Art Nouveau designers across Europe were specifically reacting against the diamond-centric, mathematically-precise jewellery of the Victorian high period, and looking instead for stones with organic character and unusual optical properties. Moonstone fit the brief perfectly.

The French jeweller René Lalique used moonstone extensively from the mid-1890s onwards. His most famous moonstone pieces include a 1900 brooch with moonstone, enamel, and gold combined in a dragonfly form (now in the Calouste Gulbenkian Museum in Lisbon), and a series of moonstone-and-enamel necklaces from the 1890s. Henri Vever, the other major French Art Nouveau jeweller, paired moonstone with sculpted gold and translucent enamel in pieces that defined the movement's central aesthetic.

In the United States, Louis Comfort Tiffany's Tiffany Studios, working in parallel with the better-known glass and lamp production, produced moonstone jewellery in significant volume between 1895 and 1910. Tiffany moonstone pieces from this period now command serious auction prices and are sought by Art Nouveau collectors.

The Art Nouveau moonstone moment lasted, in effective terms, about twenty years. By the First World War the movement had run its course and moonstone's prominence had declined. But the body of work produced in that twenty-year window established moonstone as a serious gemstone for serious jewellery, and gave the stone a documented presence in the high-end European jewellery tradition that the previous Eastern and folkloric history had not quite managed.

The Wilkie Collins moment

While Art Nouveau was the moment that put moonstone into the European fine-jewellery canon, an entirely separate cultural moment had put the stone into the English-speaking literary imagination thirty years earlier. Wilkie Collins's novel The Moonstone, published serially in 1868 in Charles Dickens's magazine All the Year Round, is widely cited as one of the first English-language detective novels. T. S. Eliot called it "the first, the longest, and the best of modern English detective novels." The plot concerns a sacred Indian diamond, called the Moonstone in the book, looted from a Hindu temple by an English officer and brought to England, where its loss and recovery drive the story.

Collins's "Moonstone" is technically a yellow diamond rather than an actual moonstone, which is a minor irritation to anyone in the trade who has read the book. But the choice of name reflected the gem's mythological status in Victorian English imagination. By 1868, moonstone meant, to a literate English audience, a sacred Indian stone with magical associations. Collins used the name because the cultural meaning was already established. The novel then reinforced the cultural meaning for another century.

The cumulative effect of the two cultural moments (the Art Nouveau jewellery production from 1890 to 1910, and the literary moment of 1868) is that by the early twentieth century, moonstone occupied a peculiarly unique position in Western jewellery culture: simultaneously a serious modern jewellery stone, an established literary motif, and a sacred object of Eastern mythology.

This was approximately the maximum cultural weight a single gemstone has ever carried.

The mid-century quiet

Through the period from roughly 1920 to 1990, moonstone became somewhat less prominent in European and American fine jewellery. The Art Deco aesthetic that succeeded Art Nouveau preferred sharper, more geometric stones, and moonstone's organic quality did not fit the Deco vocabulary. Mid-century jewellery preferred diamonds and coloured precious stones. The hippie and counterculture movements of the 1960s and 1970s adopted moonstone, but largely in the lower-end semi-precious market, which had the effect of disconnecting the stone from the fine jewellery world for several decades.

Moonstone never disappeared. It was used continuously in Indian jewellery tradition, in the bohemian-aesthetic Western market, and in occasional revival pieces by larger houses (Cartier and Bulgari both produced moonstone pieces in the 1970s and 1980s). But it was, by the 1990s, no longer a fashionable choice. The stone's cultural moment, it would have been reasonable to conclude, had passed.

The current revival

What happened next is, in retrospect, predictable. By approximately 2015, a new generation of designer-led independent jewellery brands began rediscovering moonstone, often in conjunction with the broader interest in iridescent, optical, and "organic" gemstones in the design culture of the 2010s.

The most influential single designer in the current moonstone moment is Sophie Bille Brahe, the Danish jeweller whose pearl-and-moonstone earrings, in particular, became one of the signature pieces of the late 2010s and early 2020s. Bille Brahe's design language (asymmetric, restrained, modernist) suited moonstone perfectly. Her work brought moonstone back into the conversation at the high end of designer jewellery.

Below the designer tier, mass-market modern brands have followed: Catbird carries moonstone pieces in its modern setting work; Mejuri offers moonstone as a regular option in its more accessible collections; Astrid & Miyu and similar British accessible brands have included moonstone in their broader gemstone ranges since approximately 2019.

The vintage market has, predictably, responded to the revived demand. Art Nouveau moonstone pieces that were quietly available at modest prices in the early 2010s now sell at substantial premiums when they appear at auction or on the dealer market. Lang Antiques, Berganza, and 1stDibs all carry serious Art Nouveau moonstone inventory; expect to pay £2,000 to £15,000 for a fine signed Art Nouveau moonstone piece in 2026.

The stone is, six thousand years into its documented history, once again fashionable.

How to wear and how to buy

Moonstone benefits from protective settings. Bezel settings, in which the stone is held in a continuous metal rim, are generally preferable to claw or prong settings for moonstone rings worn daily. The optical effect is best appreciated when the stone is set flat and viewed from above, which suits cabochon cuts; faceted moonstone is rare and rarely shows the adularescence well.

For pendants and earrings, moonstone is forgiving and pairs well with most metals. The cool blue sheen pairs particularly cleanly with white gold and platinum; it works less obviously with yellow gold (though it does work, particularly in vintage settings where the warm gold provides intentional contrast). Rose gold is the modern designer pairing, popularised by Bille Brahe and now widespread.

For buyers in the entry market, expect to pay £80 to £300 for a small modern moonstone pendant in fine silver or 14-carat gold, and £200 to £800 for a stone of similar quality in an 18-carat setting. For Sri Lankan blue sheen moonstone of premium quality, the price runs to £400 to £1,500 per carat in larger stones. For Art Nouveau period pieces, the market starts around £1,000 and runs into the tens of thousands for signed work.

The single most reliable place to buy fine moonstone in London is Bentley & Skinner for antique pieces and Susannah Lovis for the broader vintage market. Modern designer pieces are best sought directly from the designers (Bille Brahe's London stockists include Liberty and Browns). See our vintage jewellery guide for the broader argument about buying vintage and what to look for.

On care

Moonstone is softer than the harder gem-quality stones and slightly susceptible to scratching and impact damage. Store it separately from harder stones in a soft pouch or compartmented box. Clean with warm water and a soft brush, never with ultrasonic cleaners (which can fracture the layered internal structure) or steam cleaners. Avoid prolonged direct sunlight, which can fade the colour of stones with significant body tint.

A well-cared-for moonstone will last indefinitely. The Roman and Sri Lankan moonstone pieces in museum collections, some of them nearly two thousand years old, retain their adularescence as clearly as the day they were cut.

This is, in the long run, what the stone is for. It is one of the few materials humans have ever worked with that genuinely doesn't lose its visual character with time.

Frequently asked questions

What is the meaning of moonstone?

Moonstone has been associated with lunar deities, intuition, feminine spiritual energy, and dream work across multiple cultural traditions for at least two thousand years, and probably longer in oral tradition. Indian, Roman, and Greek traditions all linked the stone to moon goddesses (Chandra in Indian tradition, Artemis and Diana in Greek and Roman). In modern crystal-healing and astrological practice, moonstone is associated with emotional balance, new beginnings, and intuition. These associations are cultural and traditional rather than scientific.

What causes moonstone's blue glow?

The optical effect, called adularescence, is caused by light scattering between sub-microscopic alternating layers of two feldspar minerals (orthoclase and albite) within the stone. As light enters the layered structure, it diffracts and produces the characteristic floating blue or white sheen. The effect is a real physical phenomenon (a Schiller effect) and is the same type of optical scattering that produces colour in butterfly wings and peacock feathers.

What is the difference between moonstone and rainbow moonstone?

Despite the name, "rainbow moonstone" is technically a different mineral. True moonstone is orthoclase feldspar with albite inclusions. Rainbow moonstone is actually labradorite, a different feldspar mineral with a different chemical composition and different optical character. Rainbow moonstone has a pale body colour and multicoloured (rather than blue-only) flash. Both are sold as "moonstone" in the trade but the chemical distinction is real.

Is moonstone a birthstone?

Yes. Moonstone is one of the three modern birthstones for June, alongside pearl and alexandrite. The June birthstone tradition is relatively recent in its modern form (codified by the American Gem Society in 1912), but moonstone has been associated with June and with summer-solstice symbolism in older European traditions.

How much does moonstone cost?

Moonstone prices vary substantially based on origin, size, and quality of the adularescence. Small modern moonstone pieces in silver settings start at around £40. Fine Sri Lankan blue sheen moonstone in larger stones runs £400 to £1,500 per carat in 2026. Signed Art Nouveau moonstone pieces by makers like Lalique, Vever, or Tiffany Studios start around £2,000 at auction and run into five figures for important examples.

Can moonstone be worn every day?

Yes, with reasonable care. Moonstone is 6 to 6.5 on the Mohs hardness scale, which is durable enough for daily wear in protective settings (bezels are preferable to claws for daily-wear rings). The stone should be stored separately from harder stones to avoid scratching, and avoided around ultrasonic cleaners. For pendants and earrings, moonstone is entirely suitable for daily wear without special precautions.

Where does the best moonstone come from?

Sri Lanka (historically Ceylon) is the premium source for blue sheen moonstone, the most highly valued variety. Indian moonstone, particularly from the Madurai region, is also of fine quality. Other sources include Madagascar, Myanmar, Tanzania, Brazil, and parts of the United States. Sri Lankan blue sheen moonstone of fine quality commands the highest premium in the global market.