Updated as of June 2026
Hackmanite
A variety of sodalite famous for tenebrescence, changing color with light exposure. This shifting quality has made it a favorite among collectors and crystal enthusiasts.
Price range$15 to $120/ct
Hardness (Mohs)5.75
ColorsPink, Violet, Purple, White
BirthstoneNone
AltGems Score How we score
5.2/10
Hackmanite pros and cons
Pros
- Strong value for the look
- Usually sold untreated
Cons
- Softer at Mohs 5.75, best in protected settings
- Quality varies widely, so compare before buying
Hackmanite is best kept for earrings, pendants, and protected settings rather than rough daily wear.
Explore Hackmanite
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 bestHackmanite jewelry
Hackmanite ringsHackmanite engagement ringsHackmanite necklacesHackmanite pendantsHackmanite earringsHackmanite bracelets
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 5.75) in an exposed daily-wear ring instead of a protective bezel or halo.
- Cleaning it the wrong way. Moderately soft. Clean with warm soapy water and a soft brush. Color may shift with light, which is natural and reversible.
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Purple · Mohs 7Where to buy Hackmanite: 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 Hackmanite?
A variety of sodalite famous for tenebrescence, changing color with light exposure. This shifting quality has made it a favorite among collectors and crystal enthusiasts. It rates 5.75 on the Mohs hardness scale and commonly appears in pink, violet, purple, white.
How much does Hackmanite cost?
Hackmanite typically runs about $15 to $120 per carat depending on color, clarity, cut, and origin. See our Hackmanite price guide for detail.
Is Hackmanite good for everyday jewelry?
It rates 5.75 on the Mohs scale, so it suits earrings, pendants, and occasional-wear rings better than daily rough use.
What is the AltGems Score for Hackmanite?
Hackmanite earns an overall AltGems Score of 5.2 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 Hackmanite?
Moderately soft. Clean with warm soapy water and a soft brush. Color may shift with light, which is natural and reversible.