
What the product listing won't tell you
Know before you buy
The 'mineral salts' on this label are potassium alum, and potassium alum is an aluminum compound. It works differently from the aluminum actives in antiperspirants: it sits on the skin's surface to stop odor bacteria rather than plugging sweat glands. But if you are avoiding aluminum in every form, or anyone in your family has an aluminum contact allergy, this is not an aluminum-free product.
Crystal
Crystal Mineral Deodorant Stick Unscented
Crystal
Crystal Mineral Deodorant Stick Unscented
$7.29
We may earn a commission. It doesn't affect our scores.
You want the simplest possible ingredient list: this stick contains exactly one published ingredient, with no fragrance, baking soda, or fillers
You or your teen have reacted to baking soda or fragranced deodorants and need a gentle, unscented option
You are on a budget: at $1.72 per ounce one stone costs a fraction of most natural sticks and can last months
You understand potassium alum is an aluminum salt and are comfortable with how it differs from antiperspirant aluminum
You want odor control without blocking sweat, for example for a kid starting their first deodorant
You are avoiding aluminum in every form: potassium alum, the only ingredient here, is an aluminum compound
Anyone using it has an aluminum contact allergy, since the salt sits directly on the skin
You only buy products audited by an outside certifier such as EWG Verified or MADE SAFE; this one has none
You need an antiperspirant: this stone controls odor but does nothing to reduce sweating
Specs the product listing doesn't explain
What your food and family come into contact with every use
What determines how well this performs its core job
Ease of use, maintenance, and longevity
See exactly what's in this deodorant
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3 criteria - open any layer to see exactly what we found
“Is mineral salt really safe for my kid's sensitive skin?”
The scoring rationale is locked
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Criteria
Verified retailer - current pricing
Starting price
$7.29
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The Crystal Mineral Deodorant Stick Unscented was graded against the same deodorant-specific rubric we apply to every product in this category — no brand-by-brand exceptions, no sponsored placements, no affiliate-weighted scores. The verdict above came from three pillars: safety (materials, certifications, recall history, chemical exposure pathways), efficacy (independent testing data, verified performance specs, real-world usage durability), and usability (ergonomics, cleaning, noise, parts availability over time). Every point deduction has a citation behind it. Every claim links back to a primary source. Nothing is hidden behind opaque badges.
What separates this from a typical deodorant review elsewhere on the web: we don't accept sponsorships, paid placements, or rev-share-weighted rankings. The brand of the Crystal Mineral Deodorant Stick Unscented cannot pay to move up the list. The score is logic-driven (a weighted formula across safety, efficacy, and usability), not opinion-driven, so an editor's personal preference cannot override the evidence. When two products in this category are within a point of each other, the right tie-breaker is whichever pillar matters most to your household — not whichever one ranks first.
A high safety score on the Crystal Mineral Deodorant Stick Unscented doesn't automatically mean “buy this.” A deodorant that's genuinely safe but loses points on efficacy may still be the wrong fit if performance is what you actually need. Conversely, a deodorant that's usability-strong but safety-flagged probably isn't the right call for a child with a known sensitivity. The score is the start of the decision, not the end.
R3 is not a medical, legal, or financial advisor. This review is general consumer-safety reporting, not personalized health guidance. If a safety concern on this page intersects with a specific allergy, sensitivity, or medical condition in your household, talk to your pediatrician or a board-certified specialist — they can weigh the evidence against your family's situation in a way no review can. We'll update this page when credible new evidence changes the picture (a recall, a new lab certification, a meaningful product redesign); the last-updated date in the byline is the source of truth on how current this analysis is.
#2 of 7 deodorants reviewed
Did the Crystal Mineral Deodorant Stick Unscented pass our safety screen?
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“Will this actually keep my kid dry for a full day?”
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Criteria
“Does it apply cleanly without white marks or mess?”
The scoring rationale is locked
Free account unlocks exactly why this product scored the way it did.