4.2(9,200)Amazon rating$16.996,000+ bought last month
Our verdict
Ultra Micro Crystals is a 5 lb unscented, non-clumping crystal litter positioned as a premium option, and with over 9,200 reviews averaging 4.2 stars plus strong monthly purchase volume, it's clearly found a loyal audience among crystal litter shoppers.
Owners who prefer fragrance-free crystal litter and want a premium formula with a large, well-established review history to back it up.
Skip if
You specifically want a clumping formula for daily scoop-and-toss cleaning, since this is a non-clumping crystal litter.
Priced 32% below the category median ($24.99 across 153 tracked models)
Our scorecard
4.2/5overall
Owner rating4.2/5
4.2 average across 9,200 owner ratings
Popularity4.2/5
9,200 owner reviews, more than most models here
The overall score is owner satisfaction weighted by how many reviews back it, so a high rating from few reviews counts for less. The bars below show where this model stands against the other dog and cat food, health, gear and grooming we track in this category on price, popularity and size. Context, not marks against it, and our read of the data, not a lab test.
Overview
["This 5 lb bag is built around micro crystals, marketed as a premium, unscented, non-clumping formula. Like other silica-based litters, it's designed to absorb moisture rather than form scoopable clumps, so the day-to-day routine leans toward periodic changes.", 'Being unscented sets it apart from the many Febreze and fresh-scent clumping litters common in this category, which matters for cats or owners who find added fragrance off-putting. The 5 lb size keeps the bag light and manageable to pour.', "At $16.99 for 5 lb, it's priced similarly to other premium crystal litters, and it stands out with more than 9,200 reviews averaging 4.2 stars along with roughly 6,000 units bought in the past month, a notably high volume for this product type."]
Pros
Unscented formula for fragrance-sensitive cats and owners
Very large review base of over 9,200 ratings
Strong monthly purchase volume relative to similar crystal litters
Solid 4.2 star average
Cons
Non-clumping format isn't suited to owners who want daily clump scooping
Small 5 lb bag size for households with heavier litter needs
Performance notes
As a micro crystal, non-clumping formula, this litter works by absorbing moisture directly into the crystal structure rather than forming clumps, which is standard for silica-based cat litters and means less frequent scooping but periodic full changes.
What buyers say
With more than 9,200 reviews and a 4.2 star average, plus about 6,000 units bought in the past month, this is one of the higher-volume crystal litters in this lineup, suggesting it's a repeat favorite among owners who prefer the crystal format.
No, it's marketed as an unscented formula, making it a fragrance-free option for cats or owners sensitive to scented litter.
Does this litter clump?
No, this is a non-clumping crystal litter, so maintenance is based on periodic full changes rather than daily clump scooping.
How does this compare in popularity to other crystal litters?
With over 9,200 reviews and about 6,000 units bought in the past month, it has notably higher review and purchase volume than some of the other crystal litters in this lineup.
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