September Birthstone Sapphire: The Complete Guide

Short Answer

The September birthstone sapphire is best known for its rich blue, but it comes in almost every color except red. Red corundum is a ruby, so the two are the same mineral in different shades.

At 9 on the Mohs scale, sapphire is second only to diamond in hardness, which makes it excellent for daily wear and engagement rings. Prices range widely, from lab-grown stones under $150 a carat to fine natural sapphires well past $10,000.

Most people picture one thing when they hear sapphire: a deep royal blue. That's the image on every engagement ring and in every crown jewel photo. But believing sapphires are only blue is the most common, and most expensive, mistake a buyer can make.

Sapphire comes in nearly every color there is. It's also one of the toughest gems on earth, which is why it's a favorite for rings you'll wear for life. Here's everything worth knowing about the September birthstone sapphire: its colors, its value, its durability, and what to check before you buy.

Sapphire Isn't Just Blue

Sapphire is a variety of the mineral corundum. In its pure state, corundum is colorless. Trace elements are what give it color, and different elements produce different results.

• Blue comes from iron and titanium. It's the classic, most prized color.

• Pink, yellow, green, purple, and orange sapphires are called "fancy sapphires," and all are genuine.

• White sapphire is colorless corundum, a popular diamond alternative.

• Padparadscha is the rare pink-orange variety, and the most coveted of the fancies.

• Red corundum isn't a sapphire at all. That's a ruby.

Knowing this opens up your options. A yellow or teal sapphire is just as authentic as a blue one, and often costs considerably less.

What Makes a Sapphire Valuable

Color leads by a mile, but four factors decide the price:

• Color. The ideal is a strong, vivid blue that's neither inky-dark nor washed out. Kashmir's velvety "cornflower blue" is the most valuable of all, followed by Burmese "royal blue."

• Clarity. Sapphires should be eye-clean. Fine natural stones may hold tiny inclusions, which actually help prove they're natural.

• Cut. A good cut brings out the color and brilliance. A poor one leaves the stone flat or dark.

• Carat weight. Larger sapphires get rare fast, so price climbs steeply with size.

One more factor sits behind all of these, and it's the one most guides skim over.

The Treatment Question

Around 90% of commercial sapphires are heat-treated to deepen their color and improve clarity. This is standard, permanent, and accepted throughout the industry. A heat-treated sapphire is still 100% natural.

The catch is price. Untreated natural sapphires are genuinely rare, and they command steep premiums over treated stones of the same look. So when you compare two sapphires, treatment status matters as much as color.

The rule is simple: a trustworthy seller states clearly whether a stone is untreated, heat-treated, or lab-grown. If that information isn't offered, ask. If it still isn't given, walk.

Natural vs. Lab-Grown Sapphire

Lab-grown sapphire has the exact same chemistry, hardness, and beauty as natural sapphire. It's a real sapphire, not an imitation.

The difference is price, and it's dramatic. A one-carat lab-grown blue sapphire runs roughly $30 to $150. A one-carat fine natural blue sapphire can run $1,000 to $10,000 or more.

Which is right for you comes down to purpose. If you want a beautiful, durable stone to wear and enjoy, lab-grown gives you far more sapphire for your money. If you want rarity, resale value, or an heirloom with a natural origin, only a natural stone delivers that.

How Durable Is Sapphire?

Extremely. This is where the September birthstone sapphire quietly outshines almost every other colored gem.

At 9 on the Mohs scale, sapphire is second only to diamond in hardness. Almost nothing you encounter day-to-day is hard enough to scratch it. It also has excellent toughness with no cleavage plane, so it resists chipping when knocked.

Put simply, this is not a special-occasions-only gem. A sapphire ring can be worn every single day, through decades of ordinary life, and still look sharp. That's exactly why it's such a popular engagement ring stone, and why royal sapphires survive generations intact.

Where Sapphires Come From

A handful of sources shape the sapphire market, and origin affects both price and prestige:

• Kashmir produced the legendary velvety cornflower blue. Those stones are exceptionally rare and command the highest prices.

• Sri Lanka (Ceylon) has mined sapphires for over 2,000 years and is known for bright, lively blues.

• Myanmar (Burma) produces deep "royal blue" stones.

• Madagascar is a major modern source across many colors.

• Montana is famous for distinctive teal and steel-blue sapphires.

Meaning and Symbolism of September Birthstone Sapphire

Sapphire has carried meaning for thousands of years. The name comes from the Greek sappheiros, simply meaning "blue stone."

Ancient Persians believed the earth rested on a giant sapphire, and that its reflection colored the sky. Medieval clergy wore sapphires to represent heaven, and kings wore them believing they offered protection from harm and envy.

Today, sapphire symbolizes wisdom, loyalty, truth, and sincerity. It's also the traditional gemstone for the 5th and 45th wedding anniversaries.

Caring for Sapphire

Sapphire is refreshingly low-maintenance thanks to its hardness:

• Clean it with warm water, mild soap, and a soft brush.

• Ultrasonic cleaners are generally safe for untreated and heat-treated stones, though warm soapy water is always the safest bet.

• Avoid steam cleaning if your sapphire has fracture-filling treatment.

• Store it separately, since sapphire will scratch softer stones in your jewelry box.\

Find a Sapphire Worth Keeping

The September birthstone sapphire earns its reputation. It's tough enough for a lifetime of wear, rich in history, and available in more colors than almost any other gem. Whether you want a classic blue or a teal, pink, or yellow stone, the choice is genuinely yours.

What matters most is knowing exactly what you're buying: natural or lab-grown, treated or untreated, and what that means for the price. That's how True Sanity sells every stone, with the origin and treatment disclosed up front, backed by certification, a lifetime warranty, and free resizing. 

Call us at (866) 697-6548 and we'll help you find the right sapphire.

FAQs

Is sapphire good for an engagement ring?

The September birthstone sapphire is one of the best colored-stone choices there is. At 9 on the Mohs scale, it's second only to diamond in hardness and resists both scratching and chipping. With a huge color range and centuries of symbolism around loyalty, it's built to be worn every day for a lifetime.

What color sapphire is most valuable?

A vivid, velvety blue commands the highest prices, especially the cornflower blue from Kashmir. Among the fancy colors, padparadscha, a rare pink-orange, is the most coveted. Stones that are too dark or too pale sit lower in value.

Are lab-grown sapphires real sapphires?

Yes, entirely. They have the identical chemistry, hardness, and appearance as natural sapphires, so gemologists classify them as real. The only differences are origin and price, with lab-grown stones costing a small fraction of natural ones.

Are most sapphires treated?

Yes, around 90% are heat-treated to improve color and clarity, which is a standard and accepted practice. A heat-treated sapphire is still natural. Untreated sapphires are rare and command significant premiums, which is why disclosure matters.

Can sapphires be worn every day?

Absolutely. Sapphire's hardness and toughness make it ideal for daily rings, necklaces, and bracelets. Ordinary wear won't scratch or dull it, and only a serious impact could cause damage.

What's the difference between a sapphire and a ruby?

They're the same mineral, corundum, separated only by color. Red corundum is called a ruby, and every other color is a sapphire. Both share the same 9 hardness and excellent durability.