A customer came in asking for a December-turquoise ring as an everyday piece. We showed her the Mohs scale. Turquoise sits at 5 to 6, and a ring worn to an office where she typed eight hours a day would scratch within a quarter. She left with a blue topaz ring, also December, at 8 on Mohs. That is the conversation every birthstone consultation needs to have, because the birthstone list is a tradition, not a durability spec. This is the month-by-month guide we hand to wholesale buyers.
The modern birthstone list, with the numbers that matter
The list was standardized by the American National Association of Jewelers in 1912 and updated in 2002. We pair each month with the Mohs hardness, the typical color range, and whether we recommend it for a daily-wear ring or only for a pendant. The stone quality baseline is the same regardless of tradition; we grade against the GIA color and clarity framework even on colored stones.
January: Garnet. 7 to 7.5 on Mohs. Red to deep wine. Daily-wear safe, very affordable.
February: Amethyst. 7. Lilac to deep purple. Daily-wear safe but faceted amethyst chips if hit on a desk edge.
March: Aquamarine or bloodstone. Aquamarine at 7.5 to 8 is the everyday pick; bloodstone at 6.5 is better in a pendant.
April: Diamond. 10. The default. No durability caveats.
May: Emerald. 7.5 to 8 but heavily included. We set emeralds in bezel, not prong, and warn clients about ultrasonic cleaning.
June: Pearl, alexandrite or moonstone. Pearls are 2.5 to 4 and belong on pendants and earrings, not rings. Alexandrite at 8.5 is ring-safe.
July: Ruby. 9. The most durable colored stone for a daily ring.
August: Peridot, sardonyx or spinel. Peridot at 6.5 to 7 is brittle; spinel at 8 is the ring pick.
September: Sapphire. 9. The second-best everyday stone after diamond.
October: Opal or tourmaline. Opal at 5.5 to 6 is pendant-only. Tourmaline at 7 to 7.5 works on a ring.
November: Topaz or citrine. Both 8. Durable and underpriced.
December: Turquoise, blue topaz, tanzanite or zircon. Blue topaz at 8 is the office-safe pick. Tanzanite at 6.5 is pendant-grade.
How we pair the birthstone with the setting
Hard stones go in prong settings, which show off the facets. Soft stones go in bezels, which shield the girdle. We also pair birthstones with a secondary melee that complements the color: a ruby with pink diamonds reads warm; a sapphire with white melee reads crisp. For clients who want both birthstones in one piece, the combination approach is in birthstone combinations, and the hardness reasoning lives in gemstone hardness for daily wear. If the customer is not set on the birthstone, choosing a gemstone for a custom ring walks through the alternatives.
Wholesale buyers: we stock calibrated birthstone packs in 4 mm, 5 mm and 6 mm rounds for the twelve months. Each pack includes a primary stone and two secondary options so you can steer the customer to a durable pick on the spot.
Two trade tips from our bench. First, heated stones are cheaper than unheated and almost always fine for everyday wear; the heat treatment is stable and permanent. We only flag unheated for investment-grade pieces. Second, color saturation matters more than carat on colored stones. A 6 mm vivid sapphire reads larger on the hand than a 7 mm pale one, because the eye registers color, not size, on a ring. We pull two stones of each birthstone in the customer's price range and let her pick the saturation, not the millimeter.
We also get asked about anniversary birthstones. The traditional list pairs years with materials rather than stones: 1st gold, 5th sapphire, 10th diamond, 20th china, 25th silver, 50th gold. Where the birthday birthstone and the anniversary material overlap, the piece writes itself. Where they do not, we suggest using the anniversary material as the metal and the birthday birthstone as the stone, which satisfies both traditions in one ring.
Is the birthstone list the same in every country?
The US list is the most common. The UK has a slightly different set, and Hindu tradition uses a separate navaratna list. We can cut to either; tell us which tradition the customer follows.
Can I put a birthstone in a wedding band?
Yes, if the stone is 7 or harder. Ruby, sapphire, diamond, aquamarine, topaz and spinel all work. Opal, pearl and turquoise do not.
Do birthstone rings need special cleaning?
Most can go in warm soapy water. Emeralds, opals and pearls cannot go in an ultrasonic cleaner. We include a care card with every commission.
What birthstone is best for a mothers ring?
We build mothers rings with 3 to 5 small birthstones in a row. Durability picks are ruby, sapphire and emerald; softer stones like opal are set in bezel and worn as a pendant instead.
How far in advance should I order a birthstone commission?
Four weeks. Colored stones take a few extra days to source if the customer wants a specific color grade, so a six-week cushion for a birthday gift is safer.
