Updated as of June 2026
Tourmaline
A gem family spanning nearly every color, including bicolor watermelon stones, traditionally tied to balance and protection.
Price range$20 to $800/ct
Hardness (Mohs)7.25
ColorsGreen, Pink, Blue, Multicolor, Black
BirthstoneOctober
AltGems Score How we score
7.0/10
Tourmaline pros and cons
Pros
- Good durability (Mohs 7.25) for most jewelry
- Exceptional brilliance and sparkle
- A recognized birthstone (October)
Cons
- Commonly treated (heat treatment)
- Quality varies widely, so compare before buying
Tourmaline is ideal for earrings, pendants, and occasional-wear rings, and works in everyday rings with a protective setting.
Explore Tourmaline
Meaning and properties
Symbolism, zodiac, chakraPrice and value
What it costs and whyBuying guide
How to choose and where to buyCare and cleaning
Keep it looking its bestTourmaline jewelry
Tourmaline ringsTourmaline engagement ringsTourmaline necklacesTourmaline pendantsTourmaline earringsTourmaline bracelets
Tourmaline by cut
Round TourmalineOval TourmalineEmerald Cut TourmalineCushion TourmalinePrincess TourmalinePear TourmalineAll cuts
Tourmaline ring styles
Tourmaline solitaire ringTourmaline halo ringTourmaline three stone ringTourmaline hidden halo ringTourmaline vintage and antique ringTourmaline bezel ringAll styles
Tourmaline by metal
Tourmaline in yellow goldTourmaline in white goldTourmaline in rose goldTourmaline in platinumTourmaline in sterling silver
Common buying mistakes
- Buying on carat weight alone instead of color and cut, which drive beauty more.
- Skipping treatment disclosure, which changes both value and care.
- Overpaying at one retailer without comparing the same color and carat elsewhere.
- Cleaning it the wrong way. Durable. Clean with warm soapy water and a soft brush. Avoid ultrasonic cleaners and sudden temperature changes.
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Where to buy Tourmaline: for fine pieces, choose established jewelers with clear return policies and lab reports; for unique or budget pieces, vetted marketplace sellers work well. Always confirm treatment and the return window before buying. AltGems prices are general per-carat guides, so verify value with a certified gemologist or GIA report.
Frequently asked questions
What is Tourmaline?
A gem family spanning nearly every color, including bicolor watermelon stones, traditionally tied to balance and protection. It rates 7.25 on the Mohs hardness scale and commonly appears in green, pink, blue, multicolor, black.
How much does Tourmaline cost?
Tourmaline typically runs about $20 to $800 per carat depending on color, clarity, cut, and origin. See our Tourmaline price guide for detail.
Is Tourmaline good for everyday jewelry?
It rates 7.25 on the Mohs scale, so it suits earrings, pendants, and occasional-wear rings better than daily rough use.
What is the AltGems Score for Tourmaline?
Tourmaline earns an overall AltGems Score of 7.0 out of 10, balancing durability, brilliance, value, rarity, and everyday wearability. See our methodology on the How We Score page.
How do I care for Tourmaline?
Durable. Clean with warm soapy water and a soft brush. Avoid ultrasonic cleaners and sudden temperature changes.