June Birthstone: Pearl, Alexandrite, and Moonstone

In this Guide

What Is the Real Birthstone for June?

Pearl is the most historically established birthstone for June. Its association with the month predates any formal birthstone list by centuries. When the National Association of Jewelers met in Kansas City in 1912 and adopted the first modern birthstone list, pearl and moonstone were both already named for June. Alexandrite followed in 1952, added by the Jewelry Industry Council of America as a third option.

So there is no single “correct” answer to which June birthstone is most real. All three hold equal official status today. Pearl carries the deepest history. Moonstone has nearly as long a formal standing, tracing back to the same 1912 list. Alexandrite, while equally official, is the most recent of the three.

Why Are There Three Different Birthstones for June?

June, August, and December are the only three months with more than one official birthstone — a consequence of how the modern list was built and later revised, not a deliberate plan for variety. Pearl and moonstone were both attached to June from 1912. Alexandrite was added in 1952 to give buyers a third option, set apart from the other two by both rarity and price.

The practical effect is a birth month with three stones at three different price points and three different durability profiles. Pearl is the most accessible and the most delicate. Moonstone sits in the middle, on both counts. Alexandrite is the rarest, the most durable, and the most expensive. June’s three birthstones are not interchangeable versions of the same idea — they are three separate structural decisions.

What Is the Colour for a June Birthday?

There is no single colour for June. The three birthstones span an unusually wide range: pearl in soft white or cream, moonstone near-colourless with a pale blue sheen, and alexandrite defined not by one colour but by a shift between two — green to bluish-green in daylight, red to purplish-red under incandescent light.

If one colour is associated with June by default, it is the soft white of pearl, the most historically established of the three stones. But the accurate answer is that June does not hold to a single hue the way July holds to red or October holds to its play of colour. The month’s identity is built on contrast, not consistency.

Pearl: Structure and Meaning

Pearl is an organic gem — the only birthstone formed inside a living organism rather than within the earth. Natural pearls form when a mollusk secretes nacre, layer upon layer, around an irritant that has entered its shell. Cultured pearls follow the same biological process under controlled conditions: a technician introduces tissue, or tissue and a bead nucleus, into a host mollusk, which the mollusk then coats in nacre exactly as it would a natural irritant. Natural pearl beds have been fished for thousands of years and are now largely depleted, which is why cultured pearls account for the vast majority of pearls sold today.

Saltwater cultured pearls are farmed across several distinct regions, each producing a different character of stone. Akoya pearls come primarily from Japan and southern China. South Sea pearls are farmed from northern Australia through Indonesia and the Philippines. Tahitian pearls—the dark, naturally coloured pearls associated with French Polynesia — are cultured in the Gambier Islands and Tuamotu Archipelago. China is the dominant source of freshwater cultured pearls.

Pearl has long carried associations with purity, humility, and simplicity, and was traditionally given as a wedding gift. One of the most documented examples of the stone’s historical weight is the 50.56-carat La Peregrina pearl, discovered in the Gulf of Panama in the 1500s and later set by Cartier into a necklace gifted to Elizabeth Taylor; Christie’s New York auctioned the piece for $11.8 million in 2011. For the authoritative reference on pearl formation and grading, GIA’s pearl resource is the industry standard.

Structurally, pearl is soft—2.5 to 3.0 on the Mohs scale. This is the lowest hardness of any birthstone in common use, and it determines almost everything about how a pearl is designed into jewelry, worn, and maintained.

On pearl colour: Cultured pearls now come in white, cream, pink, gold, grey, and black, depending on mollusk species and culturing region. There is no single “correct” pearl colour—the right one is a design decision based on the piece, the metal it sits against, and the wearer’s skin tone.

Alexandrite: Structure and Meaning

Alexandrite is a rare variety of the mineral chrysoberyl, distinguished by a colour change that shifts with the light source. The finest stones show a vivid green to bluish-green in daylight or fluorescent light, and an intense red to purplish-red under incandescent light. The effect is structural, not decorative — it results from how the stone’s crystal lattice absorbs specific wavelengths of light.

The major deposits were discovered in 1830 in Russia’s Ural Mountains, and the stone was named for the young Alexander II, heir to the Russian throne. Its red and green colour shift mirrored the imperial military colours of the period, which gave the gem immediate national significance. Those original deposits have long been exhausted. Most alexandrite today comes from Brazil, Sri Lanka, and East Africa — sources that produce fine material, though stones matching the precision of the 19th-century Russian originals remain uncommon.

Certain alexandrites also display chatoyancy, the cat’s-eye effect, when long, thin inclusions align in parallel within the stone. Combined with colour change, this makes cat’s-eye alexandrite one of the more unusual phenomena in coloured gemstones. For grading standards and sourcing detail, GIA’s alexandrite resource is the reference point.

Structurally, alexandrite is the most durable of the three June birthstones — 8.5 on the Mohs scale, with excellent toughness and no cleavage. This is the property that separates it from pearl and moonstone in any conversation about daily wear.

On rarity and price: Fine alexandrite is scarce at any size, and large, well-defined colour-change stones are genuinely rare. This scarcity — not branding — is why alexandrite sits among the more expensive coloured gemstones in the trade.

Moonstone: Structure and Meaning

Moonstone is the best-known gem variety of the feldspar mineral group, recognized for adularescence — a glow that appears to billow across the surface of the stone as it moves under light. The finest examples show a blue sheen floating over a colourless or near-colourless body. The optical effect is the entire basis of the stone’s appeal; without it, moonstone is simply feldspar.

The most significant sources are Sri Lanka and India, with additional material from Brazil, Madagascar, Myanmar, and Tanzania, as well as smaller US deposits in New Mexico, North Carolina, and Virginia. Moonstone has carried lunar associations across multiple cultures — linked to Roman and Greek lunar deities, and described in Hindu tradition as solidified moonbeams. It saw two notable design revivals: among Art Nouveau jewelers such as René Lalique and Louis Comfort Tiffany in the 1890s–1910s, and again during the design movements of the 1960s and 1990s. For sourcing and grading reference, see GIA’s moonstone resource.

Structurally, moonstone ranks 6 to 6.5 on the Mohs scale — moderate hardness, but with poor toughness. It can crack under high heat, which directly informs how it should be cleaned and worn.

On adularescence: The strength of a moonstone’s glow depends on the orientation of the cut relative to the stone’s internal structure. A well-cut moonstone, shaped specifically to centre the adularescence, will outperform a larger stone cut without that consideration in mind.

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Care and Maintenance

Pearl — Wipe with a soft, damp cloth after each wear. Store separately from other jewelry to avoid scratching, and never store in a plastic bag, which can emit chemicals that damage the surface. Apply perfume, hair products, and cosmetics before putting on pearl jewelry, not after.

Alexandrite — Clean with warm, soapy water. Given its hardness and excellent toughness, ultrasonic and steam cleaners are generally safe, though warm soapy water remains the more conservative option.

Moonstone — Clean only with warm, soapy water and a soft brush. Its poor toughness and sensitivity to heat make ultrasonic and steam cleaning unsuitable; either can crack the stone.

Frequently Asked Questions – June Birthstone