Turquoise is the oldest gem in the human jewelry tradition. Egyptians were wearing it 7,000 years ago, Native American artisans have worked it for at least two thousand years, and Persian lapidaries turned it into the centerpiece of their crown jewelry. It's also one of the most reactive, porous, and maintenance-heavy stones you can put on your hand. If you own turquoise, or you're thinking about buying it, you need to know what you're signing up for.

Turquoise ring being cleaned with a soft cloth
Turquoise should never be soaked or ultrasonically cleaned. A soft, dry cloth is the right tool.

The bench-side problem with turquoise is that it isn't really a "gemstone" in the way sapphire or ruby is. It's a hydrated copper aluminum phosphate that forms as a vein in weathered rock. Natural turquoise is porous — water, oil, sweat, perfume, and lotion all soak into it and change its color. What started as a clear sky blue can turn a darker green, or even a muddy yellow-green, after a few years on someone's skin.

Stabilized vs. natural turquoise

Because so much natural turquoise was changing color on people's hands, the industry developed stabilization in the mid-20th century. The process takes porous rough turquoise and impregnates it with resin or polymer under vacuum. The result is a stone that is harder, more consistent in color, and much less reactive to skin oils. The trade-off is that "stabilized" is not "natural" — the color is often uniform, and the material doesn't have the depth of a fine untreated stone.

At our bench, we're pragmatic about this. For a piece someone will wear every day, stabilized turquoise is the responsible choice. It won't turn green on the client, and we won't be resetting it in two years. For a collector piece or a statement ring that lives in a box, natural untreated turquoise is worth the extra money and the extra care.

There is also "treated" turquoise, which is a step beyond stabilization: chalk-quality material that has been heavily dyed and resin-impregnated to look like fine blue stone. This is the cheap material you see in mall jewelry at low prices. It fades, it chips, and it's not what you want if you're buying a piece that matters. Ask the dealer whether the stone is natural, stabilized, or treated — and if they don't know, walk away.

Sleeping Beauty and other famous sources

The most famous turquoise source is the Sleeping Beauty mine in Arizona, which produced a pure, robin's-egg blue material with almost no matrix. The mine closed in 2012, so Sleeping Beauty is now a collector's stone that commands strong prices. Other notable sources are the southwest US (Nevada, New Mexico), Iran (which produces the classic sky blue with a slight green cast), and China.

"Matrix" refers to the dark web-like host rock running through the turquoise. Some buyers love it — it gives the stone character. Others want clean, uniform blue. There's no right answer, but matrix-heavy stones are usually more porous, so they need more careful care.

Hardness and setting

Turquoise runs 5 to 6 on the Mohs scale, which puts it well below the line we use for everyday gems. That's soft — softer than glass, softer than a steel file. It scratches easily, and it chips if you knock it against something hard. We always set turquoise in bezel settings, never in exposed prongs. A bezel wraps the stone in metal and protects the edges from knocks. A prong setting on turquoise is an invitation to chip the corner within a year of daily wear.

We also never use turquoise in rings that will be worn for manual work. It's fine for an evening piece, a signet ring worn on the right hand, or a pendant. It is not fine for a construction worker's daily band.

Care rules that matter

Here is the short version of what turquoise owners need to remember:

  • Don't soak it. Water is the enemy. Turquoise absorbs water, which can soften the resin in stabilized material and cause natural turquoise to crack as it dries.
  • Don't clean it with chemicals. No dish soap, no jewelry cleaner, no ultrasonic. Just a soft, dry cloth. If it's really dirty, a slightly damp cloth, then immediately dry.
  • Don't wear it in the shower, pool, or hot tub. Chlorine and soap film will dull the surface.
  • Don't spray perfume or hairspray while wearing it. Those chemicals will eat into the surface over time.
  • Store it separately. Turquoise scratches against harder gems. Keep it in its own pouch or compartment.
  • Keep it out of prolonged sunlight. Strong sun can fade the color, especially in untreated material.

Why people still love it

Given all those caveats, you might wonder why anyone bothers. The answer is that turquoise has a color nothing else can match. There is no other gem that gives you that specific sky blue, that soft matte luster, that sense of history. Fine untreated turquoise from a closed mine is a piece of wearable geology, and the people who love it are willing to put up with the maintenance.

If you're buying your first turquoise piece, start with stabilized material in a bezel setting. It will teach you how the stone lives on your hand, and when you're ready to graduate to natural untreated material, you'll know exactly what care routine to follow. We're happy to walk through the trade-offs with you at the bench.

The International Gem Society moissanite guide explains how moissanite performs in daily wear compared with diamond.

Authoritative References

For buyers who need to verify the technical and regulatory basis of this guide, the following independent institutions publish authoritative reference data:

Frequently Asked Questions

What care instructions should I give end customers?

Remove jewelry before swimming, cleaning or applying perfume. Store dry in a sealed bag. Clean with mild soap and a soft brush, then dry fully.

How often does rhodium plating need renewal?

Every 12–18 months under daily wear. Offer a re-plating service to your customers to build repeat visits.

Does chlorine damage sterling silver?

Yes. Chlorine and saltwater accelerate tarnish and can pit the surface. Rinse and dry immediately after any contact.

What causes green skin marks?

Copper or nickel in the base alloy reacting with sweat. Switch to 316L, titanium or sterling, and specify nickel-free plating.