Birthstone jewelry: what to know first

Which stones survive being worn on a hand every day, which quietly fall apart, and why the difference comes down to one number.

Birthstone Jewelry: What to Know Before You Buy
Month Stone Mohs Suitable for
January Garnet 6.5–7.5 Daily wear
Watch for chipped facet edges on the softer species.
February Amethyst 7 Daily wear
Watch for direct sunlight, which fades the purple for good.
March Aquamarine 7.5–8 Daily wear
Watch for ultrasonic cleaning of stones with visible inclusions.
April Diamond 10 Daily wear
Watch for a sharp blow along its cleavage, and grease, which kills the sparkle.
May Emerald 7.5–8 Daily wear with care
Watch for knocks, heat and ultrasonic cleaners, which open its oiled fractures.
June Pearl 2.5–4.5 Pendants and earrings
Keep it away from perfume, hairspray and sweat, which etch the nacre.
June Moonstone 6–6.5 Daily wear with care
Watch for hard knocks, which can split it along a cleavage plane.
June Alexandrite 8.5 Daily wear, any setting
It is safe in almost any setting.
July Ruby 9 Daily wear
Watch for glass filling — ask whether the stone is treated.
August Peridot 6.5–7 Daily wear with care
Watch for acid and sudden changes of temperature.
August Spinel 8 Daily wear, any setting
It is durable and even safe in an ultrasonic cleaner.
September Sapphire 9 Daily wear
Watch for fracture filling in some stones.
October Opal 5.5–6.5 Daily wear with care
Watch for heat and dry air, which make it craze.
October Tourmaline 7–7.5 Daily wear
Watch for ultrasonic cleaning of included stones.
November Topaz 8 Daily wear with care
Watch for a hard knock, which can split it along its perfect cleavage.
November Citrine 7 Daily wear
Watch for prolonged sunlight, which pales the yellow.
December Turquoise 5–6 Daily wear with care
Watch for skin oils, soap and cosmetics, which it absorbs.
December Zircon 6–7.5 Daily wear with care
Watch for chipped facet edges, because it is brittle.
December Tanzanite 6–7 Daily wear with care
Watch for knocks and sudden heat, because it cleaves.
Which birthstones take everyday wear in a ring
Which birthstones take everyday wear in a ringMohs hardness range of each modern birthstone by month, shaded by how well it suits a ring worn every day.fine for a daily ringdaily wear with carependants and earrings12345678910JanuaryGarnetGarnet: Mohs 6.5–7.5daily wearFebruaryAmethystAmethyst: Mohs 7daily wearMarchAquamarineAquamarine: Mohs 7.5–8daily wearAprilDiamondDiamond: Mohs 10daily wearMayEmeraldEmerald: Mohs 7.5–8with careJunePearlPearl: Mohs 2.5–4.5pendantsMoonstoneMoonstone: Mohs 6–6.5with careAlexandriteAlexandrite: Mohs 8.5any settingJulyRubyRuby: Mohs 9daily wearAugustPeridotPeridot: Mohs 6.5–7with careSpinelSpinel: Mohs 8any settingSeptemberSapphireSapphire: Mohs 9daily wearOctoberOpalOpal: Mohs 5.5–6.5with careTourmalineTourmaline: Mohs 7–7.5daily wearNovemberTopazTopaz: Mohs 8with careCitrineCitrine: Mohs 7daily wearDecemberTurquoiseTurquoise: Mohs 5–6with careZirconZircon: Mohs 6–7.5with careTanzaniteTanzanite: Mohs 6–7with care7 = quartz, the hardest part of household dustSource: Mohs ranges and care notes from our 43-stone referenceastrohot.com
Which birthstones take everyday wear in a ringMohs hardness range of each modern birthstone by month, shaded by how well it suits a ring worn every day.dailywith carependants14710JanGarnetGarnet: Mohs 6.5–7.5FebAmethystAmethyst: Mohs 7MarAquamarineAquamarine: Mohs 7.5–8AprDiamondDiamond: Mohs 10MayEmeraldEmerald: Mohs 7.5–8JunPearlPearl: Mohs 2.5–4.5MoonstoneMoonstone: Mohs 6–6.5AlexandriteAlexandrite: Mohs 8.5JulRubyRuby: Mohs 9AugPeridotPeridot: Mohs 6.5–7SpinelSpinel: Mohs 8SepSapphireSapphire: Mohs 9OctOpalOpal: Mohs 5.5–6.5TourmalineTourmaline: Mohs 7–7.5NovTopazTopaz: Mohs 8CitrineCitrine: Mohs 7DecTurquoiseTurquoise: Mohs 5–6ZirconZircon: Mohs 6–7.5TanzaniteTanzanite: Mohs 6–77: quartz, as in dustSource: our 43-stone referenceastrohot.com

Of the 19 modern birthstones, 10 suit a ring worn every day and 8 can be worn often with some care, while pearl is better kept to pendants and earrings. Hardness alone does not decide it: Topaz, at 8, sits with the careful group.

Why hardness decides everything

Ordinary household dust contains quartz, which sits at 7 on the Mohs scale. Anything softer than 7 is therefore being sanded, very slowly, by the air in your house. That is the main reason an opal ring loses its polish within a few years while a sapphire ring does not.

Rings take the most punishment — hands hit doorframes, desks and keyboards all day. Earrings and pendants hang free and are hit by almost nothing. A stone that is a bad idea in a ring is often perfectly sensible in a necklace.

The months that need care

  • June — pearl (2.5–4.5). About as soft as a copper coin. Dissolved by acid, so perfume, hairspray and sweat all attack it. Put it on last and wipe it after wearing.
  • October — opal (5.5–6.5). Contains up to 21 percent water and can craze — develop fine internal cracks — if it dries out or suffers a sudden temperature change. Never leave it in a hot car.
  • December — turquoise (5–6). Porous. Absorbs oils and changes color over years of contact with skin. Some owners consider that a feature.

Settings

A bezel setting wraps metal fully around the stone and protects the edges — the sensible choice for anything under 7. Prongs show more of the stone and expose it more; fine for diamond, ruby and sapphire, risky for opal and pearl.

One more practical point: never store stones loose together in one box. Diamond at 10 will scratch every other stone you own, and it does not need much contact to do it.

Cleaning

Warm water, mild soap and a soft brush suit most stones at 7 and above. Ultrasonic cleaners are risky for anything porous, fractured or heat-treated — that rules out emerald, opal, turquoise, pearl and most tanzanite. Selenite is water-soluble and should never be rinsed at all.

Questions

Which birthstone is toughest for an everyday ring?

April's diamond at 10 on the Mohs scale, followed by July's ruby and September's sapphire at 9. All three keep their polish through decades of daily wear, though even a diamond can chip from a hard blow.

Can a pearl be set in a ring?

It can, but it will not last. At 2.5–4.5 a pearl is softer than most things a hand touches. Alexandrite, at 8.5, is the practical June stone for a ring; moonstone, at 6–6.5, needs a protective setting because a hard knock can split it.

Does treatment make a stone worth less?

Disclosed treatment is normal, not a defect. Nearly all blue topaz is irradiated, most citrine is heated amethyst, and the majority of sapphire is heat-treated. Untreated stones carry a premium; treated ones are not fakes.

Cite this page

AstroHot. “Birthstone Jewelry: What to Know Before You Buy.” Accessed October 11, 2026. https://astrohot.com/birthstones/jewelry/

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