

STRAIGHT OUTTA THE LAB
Matter is the only expert-curated subscription box with REAL scientific items for serious science lovers.
Matter Spring Special:
First box FREE when you prepay for 3-months or longer
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★★★★★
"made me cry tears of joy"
Actual Customer Review
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★★★★★
"It scratches the itch for weird (but awesome!) stuff in the mail"
Actual Customer Review
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★★★★★
"Cannot recommend enough"
Actual Customer Review
AS SEEN IN:










WHAT TO EXPECT
Every month's Matter box is a unique experience filled with personal museum exhibits. Here are some of the common types of items to expect.

[ ITEM #332 - FRAGMENT OF THE EARLY SOLAR SYSTEM ]
Meteorites from Outer Space
These cosmic fragments traveled through the expanse of space before colliding with our tiny planet, carrying the secrets of other worlds.
Meteorites are among the most extraordinary specimens we offer, each fully analyzed, IMCA-authenticated, and officially classified by The Meteoritical Society.
Own a piece of the universe itself.

[ ITEM #021 - TRILOBITE FOSSIL - AGE: 500 MILLION YEARS ]
Museum-Grade Fossils
Fossils are the preserved remnants of ancient life, offering a glimpse into the creatures that roamed Earth millions—or even billions—of years before us.
Each fossil is expertly identified and guaranteed authentic by our paleontologists.
Begin your own natural history collection and hold a piece of prehistoric time in your hands.

[ ITEM #328 - CONCORDE AIRFRAME FRAGMENT ]
Historic Artifacts
Artifacts are human-made relics—tangible links to remarkable scientific advancements throughout history.
Each piece undergoes meticulous provenance verification and expert authentication, ensuring its authenticity and significance.
These artifacts serve as direct connections to some of humanity’s most groundbreaking achievements.

[ ITEM #134 - ZIRCONIUM NUCLEAR REACTOR CLADDING ]
Fascinating Materials
Sourced directly from laboratories and specialized industries, our most astonishing materials are human-engineered marvels with extraordinary physical properties.
Discover the cutting edge of what’s possible—and let your curiosity push the boundaries even further.

[ ITEM #046 - PURE BISMUTH CRYSTAL ]
Exotic Rocks & Minerals
Our species took its first great leap into the Stone Age upon realizing that rocks could be shaped into tools—and we’ve been fascinated by them ever since.
Explore the scientific properties and real-world applications of natural rocks, crystals, and minerals.

Expert-Written Research Cards
Each item comes with a collectible science card to give you insights, context, and history of every piece of Matter—as well as a starting point for your own in-depth research.
These collectible cards also include each item's official Matter catalog number.
Plus Much More
Below is a handful of the 300+ fascinating items previously featured in Matter.
We've even partnered with some of the biggest online names in science, like @physicsfun and Tyler Thrasher to develop new and innovative scientific items not available anywhere else.
Want to be our next collab? Reach out!
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Sold out
Particle Accelerator Fragment
Regular price $68.00Regular priceUnit price / perSold out -
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Uranium Glass Ball
Regular price $15.00Regular priceUnit price / perSold out -
Woolly Mammoth Hair Fossil
Regular price $32.00Regular priceUnit price / per -
Japanese Star Sand
Regular price $8.50Regular priceUnit price / per -
Sold out
NASA "Chariot" Rover Fragment
Regular price $48.00Regular priceUnit price / perSold out -
LED Ultraviolet Flashlight
Regular price $7.50Regular priceUnit price / per -
BLK3.0: The Blackest Black Paint - 0.5oz
Regular price $14.99Regular priceUnit price / per -
Sold out
Green Uranium Glass Ball
Regular price $7.00Regular priceUnit price / perSold out -
Voyager Golden Record Cover Pin
Regular price $12.95Regular priceUnit price / per -
Sold out
Tube of 20 Neodymium Magnets
Regular price $5.00Regular priceUnit price / perSold out -
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Trilobite Fossil
Regular price From $18.00Regular priceUnit price / perSold out -
Giant Sequoia Seeds
Regular price $3.00Regular priceUnit price / per -
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Bismuth Crystal
Regular price From $5.00Regular priceUnit price / perSold out -
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Glo Germ Gel - Simulated Germs
Regular price $7.00Regular priceUnit price / perSold out -
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Giant Redwood Seeds
Regular price $3.00Regular priceUnit price / perSold out -
Bristlecone Pine Seeds
Regular price $3.00Regular priceUnit price / per -
Metal Tippe "Flip Over" Top
Regular price $8.30Regular priceUnit price / per -
Mini Matter Subscription Box
Regular price $25.00Regular priceUnit price / per -
NASA Space Shuttle Blueprint Fragment
Regular price $64.00Regular priceUnit price / per -
Sold out
Silicon Wafer
Regular price $9.00Regular priceUnit price / per$13.00Sale price $9.00Sold out -
Hand-Carved Bone Dice - Single
Regular price $3.00Regular priceUnit price / per -
Hematine Magnet
Regular price $2.00Regular priceUnit price / per -
Belemnite Fossil
Regular price $14.00Regular priceUnit price / per
HOW IT WORKS
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1. Pick your Matter plan
We offer 1, 3, 6 or 12 month plans. Cancel anytime. Free Shipping on orders over $50.
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2. We build your box
Our team is meticulously prepping, assembling, and packing the items for your box.
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3. Unbox science each month
Discover new things, facts, and interesting rabbit holes each month! Also Matter will become the package you look forward to most.
Spring Special:
First box FREE on 3-months or longer (Discount applies automatically in cart)
- 2–6 new items every month
- Research card for every item
- $50–$75 value in every box
Couldn't load pickup availability
- Authenticity Guaranteed
- 100% Carbon Neutral
- Recommended for ages 7 to 13,700,000
Can't wait until the next batch? Order a one-time Legacy Box

SUBSCRIBER BENEFITS (besides cool science stuff)
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Exclusive discounts
Active Matter subscribers get 15% off all purchases from Stemcell Science Shop. You'll receive a custom code in your first box.
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Never miss a deal
Subscribers can apply current Matter promotions toward their next renewal.
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Full self-service
Update your details, pause, or cancel your subscription at any time from your account page.
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Free US Shipping
Orders over $50 enjoy free US shipping, this includes susbcriptions!
FAQ
What comes in a box?
Every month of Matter is unique, but a typical box includes 2-6 items covering a range of scientific areas. Every item also includes a research card.
Will I receive repeat items?
Most subscribers will never get a repeat item. Each Matter box is unique, packed with scientific stuff you haven't seen before.
Occasionally we revisit a particularly amazing item, but we'll only repeat an item if it's been at least 3 years.
How many items will be in my box?
Most months contain 5 unique items, and have historically ranged from 2–8 items.
Some items are simply more valuable than others, so rather than promising a specific number of items, we curate each box with a total value of $50-$75 so that you get your money's worth every time.
Do you offer educational discounts?
Yes, we do! We're all about spreading the love for science, and we understand that schools and teachers (and students) have tight budgets. That's why we offer special educational discounts to help bring our Matter boxes into your classrooms or learning programs.
These boxes are perfect for sparking students' curiosity and complementing your science curriculum.
Apply for educational discounts here, or send us a purchase order from your school. Let's make science exciting and accessible for your learners!
How can my company collab with Matter?
If your lab or company produces a scientific item, or if our organizations' missions align, we would love to explore collaboration. Whether you're a burgeoning start-up or an established industry leader, we're open to a range of partnerships that drive science forward.
Past collaborations have included sponsorships, sourcing custom items, and even curating themed boxes.
Can I get Matter boxes for my work team?
Absolutely! Matter boxes are a fantastic way to spark curiosity and add a bit of science fun to your workplace. Whether it's for a team-building activity, a unique reward, or just to give your office a cool science vibe, we've got you covered.
We'll make sure they're packed with intriguing items that'll get everyone talking. Plus, it's a great way to mix up the usual office routine with some brain-tingling science.
Just let us know how many you need, and we'll handle the rest!
Where do you ship?
We currently ship globally via USPS or UPS
When will I receive my order?
Due to the complex prep and assembly process for each unique item, each month's batch ships together, typically around mid-month.
See the banner above to find out if this month's batch has shipped. If it has already shipped and you'd like your first box asap, consider adding a discounted past box to ship immediately while you wait for our next batch.
You'll receive a tracking number via email as soon as each box ships.
Do you have a teacher or educator discount?
Absolutely! Honoring our educators is so important to us.
Our educational discount is 15% off every order. Get your unique discount code at here.
What is your return or exchange policy?
If Matter isn't quite what you expected, or just doesn't work out, connect with our team so we can make it right.
How can I cancel auto-renewal?
You may disable the auto-renewal on your multi-month subscription commitment at any time from your account dashboard here. Please note that your cancellation will take effect at the end of your current subscription term.
If you would like to end your subscription commitment early, please contact our team.
How to update your payment info
- Log in to stemcell.eco. If you signed up through Cratejoy or Uncommon Goods, you'll need to log in there.
- Go to your account page by clicking the person icon in the upper right-hand corner of the page.
- Click 'Manage Subscriptions'
- Click the 'Manage subscription' button next to the subscription you'd like to update.
- Click 'Update' in the payment section to modify payment details.
- Click 'Edit' to change your shipping address, frequency, or to apply a discount code toward your next renewal (only one discount can be applied per renewal).
What is the difference between Matter and Mini Matter?
Matter is our classic science box of real scientific items. Mini Matter is our new, lower priced version of Matter.
Every box of Mini Matter includes 3 items we've previously featured in Matter, but all tied together with a fascinating theme. Click here to learn more about Mini Matter.
My parents got me a subscription for my birthday and I loved it so much I've kept buying it for myself after my three months were up!
Fun for all ages! Very diverse items.
Our whole family loved the surprise of what was going to be in the box. It was so special. We can't wait for the next one. My 12 year old son actually sincerely thanked me for purchasing the matter subscription box.
I love thé items that come in my science subscription box. I love thé cards that come with it describing the items and their purpose, history. The items are of high quality and super interesting and neat. I use them for myself and educating even my kids with. Helps me keep the healthy wonder of the world around me.
Thank you
I purchased a series of boxes for my Granddaughter's 12th birthday. We had so much fun going over every item in the box. She has decided to take one of the items to school for science show and tell. Loved it!
AUTHENTICITY GUARANTEED
We adhere to the highest standards of authenticity when it comes to our rare and collectible items.
We source our items from the most reputable collectors and suppliers. Then we utilize our network of scientists and experts to assist in the rigorous process of validating each item's provenance.
If we aren't 100% confident an item is authentic, it doesn't make it into the box.
Our meticulously curated collections are designed to inspire, educate, and resonate, all while maintaining an unbreakable commitment to authenticity.
WHERE OUR ITEMS COME FROM
Since 2015, we've been cultivating a supplier network that bridges every corner of the scientific world.
From fossil excavation sites to state-of-the-art laboratories, whether we're looking for a rare mineral specimen or a cutting-edge piece of technology, our network allows us to source virtually anything in the realm of science, while ensuring quality and authenticity.
WE TAKE SCIENCE SERIOUSLY
You deserve better than craft store science products. And we think learning is more impactful when you're holding a tangible piece of what you're learning about. That's why Stemcell exists.
We're dedicated to providing the best scientific products available—whether they're fragments of scientific importance, experimental activities, or just interesting things that scratch your curiosity itch.
With every new product launch, our list of new ideas gets longer rather than shorter. So check in often for our latest projects, and thanks for being a part of our endeavor to make the world a smarter place to live.
Believe in yourself; for everything else, there's science.
— TERRY MUDGE, FOUNDER & SCIENTIFIC DIRECTOR
PS. Many of our rare items sell out in minutes. Join my email list and I'll send you early notice and access to our new items as soon as they're listed.