Updated as of June 2026
Jet
A fossilized wood material polished to a deep black sheen, historically popular in Victorian mourning jewelry. Folklore links it to protection and calm.
Price range$5 to $80/ct
Hardness (Mohs)3
ColorsBlack, Brownish black
BirthstoneNone
AltGems Score How we score
4.0/10
Jet pros and cons
Pros
- Strong value for the look
- Usually sold untreated
Cons
- Softer at Mohs 3, best in protected settings
- Opaque, so it shows color rather than sparkle
Jet is best kept for earrings, pendants, and protected settings rather than rough daily wear.
Explore Jet
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 bestJet jewelry
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.
- Setting this softer stone (Mohs 3) in an exposed daily-wear ring instead of a protective bezel or halo.
- Cleaning it the wrong way. Soft and lightweight. Clean with a soft dry or barely damp cloth. Avoid water soaks, heat, ultrasonic cleaners, and chemicals.
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Black · Mohs 3.5Where to buy Jet: 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 Jet?
A fossilized wood material polished to a deep black sheen, historically popular in Victorian mourning jewelry. Folklore links it to protection and calm. It rates 3 on the Mohs hardness scale and commonly appears in black, brownish black.
How much does Jet cost?
Jet typically runs about $5 to $80 per carat depending on color, clarity, cut, and origin. See our Jet price guide for detail.
Is Jet good for everyday jewelry?
It rates 3 on the Mohs scale, so it suits earrings, pendants, and occasional-wear rings better than daily rough use.
What is the AltGems Score for Jet?
Jet earns an overall AltGems Score of 4.0 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 Jet?
Soft and lightweight. Clean with a soft dry or barely damp cloth. Avoid water soaks, heat, ultrasonic cleaners, and chemicals.