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Micrometeorites

Ever Elusive Non-Magnetic Micrometeorites

Searching for micrometeorites with a magnet is fun, exciting, and — if I’m being honest — rather addictive! Every month, the growing number of collectors discover new phenomena and our knowledge about stardust rapidly increases. Who would have thought this five years ago, when I discovered urban micrometeorites after scientists from around the world told me it was impossible?

Less common among star hunters are non-magnetic micrometeorites. These elusive particles do not contain any nickel or iron, and therefore cannot be detected with my typical method. But why aren’t there any magnetic materials in these micrometeorites? One possible explanation is that the micrometeorite echos its precursor from space and the parent body also lacked these materials. Or, alternatively, the metal evaporated in the frictional flash heating during atmospheric entry.

Extraordinary patience must be deployed when searching for non-magnetic micrometeorites, but with some practice it is indeed possible to find them!

In the new collage displayed at the top of this blog entry, I present nine glassy (V-type) micrometeorites that are non-magnetic. Five of them are from Mt. Raymond, Antarctica, borrowed from Dr. Martin Suttle’s collection, and the rest are fresh, and found by me on urban roofs.

Below is a beautiful non-magnetic glass (V-type) micrometeorite measuring approximately 0.3 mm. I found it on the roof of Vallhalla sports arena, which is where Werner Herzog filmed our stardust hunt together, as seen in the cinematic movie “Fireball: Visitors From Darker Worlds”.

Non-magnetic micrometeorite NMM 2840 discovered and photographed by Project Stardust founder Jon Larsen and Jan Braly Kihle
A non-magnetic micrometeorite, NMM 2840, which was discovered at the same place where Jon Larsen filmed went stardust hunting with Werner Herzop in Fireball: Visitors From Darker Worlds. Photo by Project Stardust founder Jon Larsen and Jan Braly Kihle. © Project Stardust, 2022.

As usual, all photos are by Jan Braly Kihle and me.

If you have any questions, I would be delighted to chat with you on Facebook, Instagram, or Twitter. If you want to learn more about micrometeorites for free, visit our new website or head to Instagram Stories for my Daily Quiz.

Yours truly,

Jon Larsen

Just in case you're new here!

Together we have amassed the world's most expansive collection of micrometeorites and we can't wait to share it with you.

Whether you're an expert in the field, an art collector with an appetite for treasures from space, or a budding stardust enthusiast, we hope you'll enjoy learning about our work.

Connect with us on social media to share the excitement of seeing new micrometeorites for the first time!

Jon Larsen & Jan Braly Kihle

We're so glad you're here!

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WINTER 2022 COLLECTION

Meet this season's micrometeorites

This season's collection features a variety of stunning micrometeorites. From mountainous cryptocrystalline turtlebacks and bewitching glass spherules to ultra rare giants. Available for a limited time only.

NMM 1448: V-TYPE

NMM 1448:  V-TYPE

Glass / Vitreous

Glass or vitreous type (V-type) micrometeorites each a temperature of up to 2000°C (3600°F) as they descend through the atmosphere..

These delicate, translucent spherules are difficult to find due to their lack of magnetism, since most of their metals evaporated during descent. 

NMM 1359:  CC-TYPE

Crypto-crystalline

Cryptocrystalline (CC-type) micrometeorites are composed of glassy particles with fine-grained crystallites that are too small to recognize as individual grains.

Many of these magnificent spherules feature metal beads and aerodynamic forms, while others have a "turtleback" shape with humps distributed evenly around the spherule.

NMM 1359:  CC-TYPE

NMM 500:  BO-TYPE

Barred Olivine

Barred olivine (BO-type) spherules are coarse-grained  micrometeorites made of the magnesium variety of the mineral olivine, forsterite, which is punctuated with small particles of magnetite.

The surface features striations that are formed when iron reacts with oxygen in the atmosphere. 

NMM 500:  BO-TYPE

NMM 1149:  PO-TYPE

Porphyritic Olivine

Porphyritic olivine (PO-type) micrometeorites are also made of forsterite, a type of olivine that is made of magnesium.

There are many morphological varieties of this type of micrometeorite; From evenly distributed small crystals, to crystals that increase in side, to extremely large or even possibly a single olivine crystal.

NMM 1149:  PO-TYPE

NMM 1271:  Sc-TYPE

Scoriaceous

When stardust does not reach a peak temperature of at least 1350°C (2500°F) during entry and deceleration, it barely melts. Volatile elements expand and escape in the form of gas bubbles, which results in a scoriaceous (SC-type) or vesicular micrometeorite.

Micrometeorites of this type are extremely difficult to find.

NMM 1271:  SC-TYPE

NMM 1271: G-, I-, CAT-typeS

Other Types

From G-types with dark silicate glass, I-types dominated by iron, and milky CAT spherules  enriched with calcium, aluminum, and titanium, to fossil, unmelted, and un-categorized micrometeorites.

There is no question that Jon Larsen and Jan Braly Kihle's contributions have had a dramatic effect on the field.

NMM 1271:  G-/I-/CAT-TYPES

Jon and Jan are
EXCEPTIONAL ARTISTS AND SCIENTISTS. 

Michael Zolensky

NASA JOhnson Space Center

SEM Collection

COMING SOON

Never forget: YOU ARE SURROUNDED BY STARDUST, inside and out.

Color Collection

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FIREBALL: Visitors from Darker Worlds

SEE JOn & Jan IN

From directors Werner Herzog and Clive Oppenheimer, this remarkable journey across our planet and universe explores how meteorites, shooting stars, and deep impacts have awoken our wonder about other realms-and make us rethink our destinies.

Limited Edition

The Atlas

of Micrometeorites

Never before has it been possible to see stardust in such a large format with crisp details. The 500+ color images are made possible by a new photo technology developed for this project by the author and mineralogist Jan Braly Kihle. 

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The Atlas of Micrometeorites provides an INVALUABLE RESOURCE
for stardust hunters around the world.

Matthew Genge

Imperial College, London

ORIGIN STORIES

Jon Larsen revolutionized the study of micrometeorites when he became the first person to discover a micrometeorite from an urban environment. Then a new form of art emerged when he and Jan Braly Kihle created the world's first high resolution photographs of micrometeorites in colour.

Learn about the singular moment that led to Jon's groundbreaking discovery
and the phone call that kickstarted a truly epic friendship.

Jon Larsen revolutionized the study of micrometeorites when he became the first person to discover a micrometeorite from an urban environment. Then a new form of art emerged when he and Jan Braly Kihle created the world's first high resolution photographs of micrometeorites in colour.

Learn about the singular moment that led to Jon's groundbreaking discovery and the phone call that kickstarted a truly epic friendship.

I HAVE TO KNOW

I'm ready. TEACH ME.

Micrometeorites

Jon Larsen and Jan Braly Kihle have amassed the world's most expansive collection of urban micrometeorites and they want you to follow in their footsteps.

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HALLO and welcome!

We're Jon Larsen & Jan Braly Kihle

We are world renowned micrometeorite experts here to share our cosmic art and inspire the world to become star hunters.

STARDUST
is everywhere