Compare Deodorant
Crystal Mineral Deodorant Stick Unscented scores higher on safety - here's why.
R3 scored the Crystal Mineral Deodorant Stick Unscented 8.6/10 and the PiperWai Natural Deodorant Stick with Activated Charcoal 7.7/10 on the same deodorant scoring system, weighing safety, efficacy, and usability. The Crystal Mineral Deodorant Stick Unscented comes out ahead, led by its safety score (8.5/10 vs 7.8/10).
The most important dimensions, side by side.
See which one actually scores higher — and why
Free account unlocks full safety scores, spec-by-spec breakdown, and the R3 verdict on Crystal Mineral Deodorant Stick Unscented vs PiperWai Natural Deodorant Stick with Activated Charcoal.
Unlock the full Crystal Mineral Deodorant Stick Unscented vs PiperWai Natural Deodorant Stick with Activated Charcoal breakdown
Free account unlocks all safety scores, complete spec comparison, scoring rationale, and the R3 verdict on which one to buy.
Everything you need to make the call - who each one is for, and who should skip it.
Go for it if you...
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 $7 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 want a label you can actually read: all 24 ingredients are published, and the brand and Amazon lists match word for word
Aluminum-free matters to you and you want it confirmed from the full ingredient list, not just the front of the package
You tolerate baking soda well and want a strong odor absorber (activated charcoal plus baking soda) for long school days and workouts
You prefer a scent built from named plant oils you can screen for your family instead of an unnamed fragrance blend
The main thing to know
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.
Sodium bicarbonate is the fifth ingredient on the label, which makes this a baking-soda-forward formula. That high concentration is the most common cause of underarm rash with natural deodorants, especially on freshly shaved skin, so patch test for a few days before making it your daily stick.
Skip this if you...
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
You or your kids have sensitive or freshly shaved skin, since baking soda this high on the label is the most common rash trigger in natural deodorants
Fragrance allergies are a concern, because the scent comes from 11 essential oils including clove, lemongrass, and bergamot, all known contact allergens
You only buy third-party certified products: this scented stick is not EWG Verified, only the brand's unscented version is
Neither of these quite what you're looking for?
I've reviewed all Deodorant options at every price pointEvery Deodorant in our database is scored using R3's deterministic scoring system - the same inputs always produce the same score. For this comparison, we evaluated Crystal and PiperWai across 3 independent criteria: Safety (92%), Efficacy (4%), Usability (4%). No sponsored rankings. No paid placements.
Straight answers - no sponsored content, no filler.
I'd start with Crystal Crystal Mineral Deodorant Stick Unscented - it scored 8.6/10 overall in our scoring system. Safety is our top-weighted scoring pillar, followed by efficacy, and usability. Check which pillar matters most to your family and compare those specific scores.
R3 uses a deterministic scoring system - the same inputs always produce the same score. We evaluate each Deodorant across Safety, Efficacy, Usability using independently verified data. No sponsored rankings. No paid placements. Every score is fully reproducible.
Not necessarily. The overall score reflects how we weight those three pillars, but your priorities may differ. If you care most about safety, compare the safety scores directly. If budget drives your decision, the prices tell a clearer story. The "right" pick is the one that matches what matters most to your family.
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