Pictured: Colorful Gemstone Delight Ring

The December birthstone is Turquoise, a sky blue stone associated with protection, friendship, and good fortune. It rates 5 to 6 on the Mohs hardness scale, which is the number that actually decides whether you can wear it every day.

What Turquoise means

Turquoise has long been linked to protection, friendship, and good fortune. December has turquoise, tanzanite, and zircon. Turquoise is the oldest and most recognisable, but it is soft and porous, so it absorbs oils and can change colour over years.

December birthstone at a glance

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Buying December birthstone jewelry at Costco and other warehouse clubs

Costco does sell genuine fine jewelry, including birthstone pieces, and its pricing is usually competitive because margins are thin and volume is high. Diamonds are commonly certified, and the return policy is unusually generous. Those are real advantages if you are buying a significant piece.

The trade-offs are equally real. Selection is limited and rotates with stock rather than being a permanent catalogue, so a specific Turquoise piece may or may not be there when you look, and a membership is required. Timing matters too: December birthdays are the hardest to shop for, because stock is picked over and priced for the season. Buy in November if you can.

What actually matters for a piece you wear daily

At 5 to 6 on the Mohs scale, Turquoise needs more care than most people expect, and is far better suited to earrings or a pendant than a ring that takes daily impact. Keep turquoise away from oils, lotions, and water. Tanzanite is also fragile.

The other half of the equation is the metal. A genuine stone set into plated brass will outlive its setting: the plating wears, the base reacts with skin, and you end up with a good stone in a piece you have stopped wearing. Whatever stone you choose, the setting decides how long you actually wear it.

The everyday alternative

If what you want is the colour and the meaning rather than the carat weight, look for turquoise-toned and blue stone pieces set on a non reactive base. Same look, none of the fragility or the price. At Ezra Gems, every piece is tarnish-free, hypoallergenic, and waterproof. Built on a surgical-grade stainless steel core for women who want to wear their jewelry every day without thinking about it. Nothing needs removing before a shower, and nothing tarnishes underneath.

The Bottom Line

December is Turquoise: sky blue, 5 to 6 on the Mohs scale, and linked to protection, friendship, and good fortune. Buy the stone for the meaning, but judge the setting on whether it will survive being worn. Shop Birthstone Jewelry.

Keep Reading

• November Birthstone: Topaz Meaning, and Where to Buy It
• October Birthstone: Opal Meaning, and Where to Buy It
• September Birthstone: Sapphire Meaning, and Where to Buy It

Frequently Asked Questions

What is the December birthstone?

The December birthstone is Turquoise.

Can you wear Turquoise every day?

It depends on hardness. Check the Mohs rating in the table above: stones at 7.5 and higher handle daily rings well, softer stones are better in earrings or pendants where they take fewer knocks.

Is Costco a good place to buy birthstone jewelry?

Costco sells genuine fine jewelry at competitive prices with a generous return policy, which suits milestone purchases. Selection is limited and rotates, and a membership is required, so it is less useful for a specific piece you want on demand.

Is Ezra Gems jewelry really waterproof?

Yes. Every piece is 18K gold plated over surgical stainless steel, a non reactive base that does not corrode in water, chlorine, or salt. You can shower, swim, sweat, and sleep in it.

Will it turn my skin green?

No. There is no copper or brass touching your skin, only surgical stainless steel under the gold plating, so it will not leave green marks or discoloration.

Is it hypoallergenic and nickel free?

Yes. Every piece is nickel free and free of lead and cadmium, made for sensitive skin and ears that react to ordinary gold tone jewelry.

For limited release designs before they sell out, Exclusive Drops is where the newest pieces land first. To shop the pieces in this guide, browse Birthstone Jewelry.