DMS_banner12.jpg (71459 bytes)
Home About Us Field Trips March Show Board/Officers Geogram Sample Meetings Members Links



                           Mineral of the Month--October 2009

                              New Jersey Norbergite

                                              Magnesium Silicate Fluoride Hydroxide





New Jersey Norbergite

                                                 By Ken Casey

A Brief History
Norbergite Picfest!
Members' Gallery
Article Contributors
Photo & Graphics Credits
Suggested Reading
Invitation to Members
Past Minerals of the Month

State of New Jersey flag
Image courtesy of World of Education

Yellow in daylight...


...bright yellow under UV light!

(Above): Norbergite in calcite, Sparta, New Jersey
Photo by Ken Casey 2009


     Welcome to Autumn at DMS!  We’ll be taking a break from our “Delaware Mineral Series”
until the Fall.  Please do join us for a Norbergite Picfest!

     So, shall we commence with this month's favorite: Norbergite?  Let's go!



     Welcome to another Fall Mineral-of-the-Month article kickoff! 

     Yes, it’s time to depart from the minerals of our beloved Delaware. Don’t worry, we will return
with more of them, after our trip around the good old USA. We’ll begin our ‘Minerals of the 50 States’
tour with our neighbor, New Jersey.

     Our search has taken us to Sparta in northern New Jersey.  The famed Limecrest Quarry holds
a wealth of colorful minerals, albeit rare ones.  This month’s study is of Norbergite.

     This bright yellow gem is found as crystals or as massive forms in the host white Franklin marble. 
I have visited the quarry several times and have some stories to tell. I’ll have more in our online article,

     Norbergite here is Magnesium Silicate Fluoride Hydroxide with chemical formula Mg3(SiO4)(F,OH)2. 
Its crystal form is Orthorhombic, and is member of the Humite Group.  The four members are: Norbergite,
Chondrodite, Humite, and Clinohumite.  Colors ranges from a bright yellow to a dull orange. Norbergite
crystals from northern New Jersey locales are typically small; whereas, the Chondrodite crystals form
larger and subhedrally.

     This bright yellow mineral also glows bright yellow under special shortwave ultraviolet light.  Though
it has no practical purpose, it is a cool curiosity to us collectors.  The Sussex County, New Jersey
material contains very little Fluorine.

Norbergite in Franklin Marble (Calcite)
Limecrest Quarry, Sparta, New Jersey
(Photo by Ken Casey)
  Norbergite in Franklin Marble (Calcite)
as shown under UV light
Farber Quarry, Franklin, New Jersey
(Photo courtesy of CR Scientific)

     It was first found and named after its initial locale, Ostanmosoa iron mine, Norberg, Vastmanland,
Sweden. And, since the Swedes settled parts of New Jersey, how fitting that we have a shared mineral
from a sister locale.

     Norbergite has been found at Franklin, Sterling Hill Mine, and at Limecrest Quarry in recent years. 
I have personally collected members from this mineral group at the bottom of the the Limecrest as far
back as 2000-01, before the company let the bottom levels fill with water.  Those were fun fieldtrips,
when The Franklin-Ogdensburg Mineralogical Society (FOMS) took us there.  There were so many
levels that we needed pickup trucks to transport us back up with our finds.  Many of us invented
wheeled conveyances to carry our pickings.

     Another author, Karenne Snow, along with co-author Scott Stepanski, have also written about this
locale.  Their revised second edition Gem Trails of Pennsylvania & New Jersey touches upon this prime
New Jersey collecting spot. Known as ‘Site 35’, you will have to peruse their book to learn more.



A Brief History


     Norbergite has been known as a mineral species before 1926 (pre-IMA).

     It occurs in northern New Jersey with its matix of the Franklin Marble, which is more like a
slightly metamorphosed Calcite.  Other minerals found with the humite group here are: Graphite,
Pyrite, Chalcopyrite, red Corundum, Dravite, Titanite, and other calc-silicates.

     As large, econonomically viable ore bodies and limestone-like deposits have been mined in
the area for decades, collecting opportunities abound. Though some sites have been closed,
many mine tailings sites exist to visit, with the right permissions, memberships, and such.

     So, happy collecting.  And, please do enjoy our photos of New Jersey Norbergite below. 



Norbergite Picfest!


Norbergite with Graphite in Calcite

Norbergite-Chondrodite in Calcite

Small, well-formed Norbergite crystals Another view


Bright yellow Norberfite in matrix Another view
Chondrodite in matrix


Larger, subhedral Norbergite crystals Chalcopyrite
Graphite crystals in Calcite Calc-silicate lens in Calcite
All specimens were collected by author from Limecrest Quarry, Sparta, New Jersey
on October 21, 2001 with a FOMS fieldtrip.
(All photos above were taken by Ken Casey, unless otherwise noted.)


     Norbergite is a cool curiousity to rockhounds and geologists.





Members' Gallery

Here is where DMS Members can add their Norbergite photos to share with us.


Until Next Time

     We hope you have enjoyed our all too short visit to Norbergite.  Please join us next month,
for another article, and we shall journey together!
     Until then, stay safe, and happy collecting. hardhat2a.gif (5709 bytes)



Article Contributors

Photo & Graphics Credits

I would like to gratefully acknowledge the generous contributions of our fellow Norbergite
enthusiasts, collectors, authors, curators, professionals, and club members who made this
work possible. 


World of Education

CR Scientific

2009  All contributions to this article are covered under the copyright protection of this article
and by separate and several copyright protection(s), and are to be used for the sole purposes of
enjoying this scholarly article.  They are used gratefully with express written permission of the
authors, save for generally-accepted scholarly quotes, short in nature, deemed legal to reference
with the appropriate citation and credit.  Reproduction of this article must be obtained by express
written permission of the author, Kenneth B. Casey, for his contributions, authoring, photos, and
graphics.  Use of all other credited materials requires permission of each contributor separately. 
Links and general contact information are included in the credits above, and throughout this article. 
The advice offered herein are only suggestions; it is the reader's charge to use the information
contained herein responsibly.  DMS is not responsible for misuse or accidents caused from this
article. All opinions, theories, proofs, and views expressed within this article, and in others on this
website, do not necessarily reflect the views of the Delaware Mineralogical Society.

Suggested Reading

Gem Trails of Pennsylvania & New Jersey by Scott Stepanski and Karenne Snow


KEN.JPG (31503 bytes)

   About the Author:  Ken is current webmaster of the Delaware Mineralogical Society.  He has a diploma in Jewelry Repair, Fabrication & Stonesetting from the Bowman Technical School, Lancaster, PA, and worked as jeweler.  He has also studied geology at the University of Delaware.  And, he is currently a member of the Delaware Mineralogical Society and the Franklin-Ogdensburg Mineralogical Society.  E-mail:

Invitation to Members


Want to see your name in print?  Want to co-author, contribute, or author a whole Mineral of the Month article?  Well, this the forum for you!

And Members, if you have pictures, or a story you would like to share, please feel free to offer.  We'd like to post them for our mutual enjoyment.   Of course, you get full photo and author credit, and a chance to reach other collectors, hobbyists, and scientists.  We only ask that you check your facts, give credit where it is due, keep it wholesome for our Junior Members watching, and keep on topic regarding rockhounding.

You don't even have to be experienced in making a webpage.  We can work together to publish your story.  A handwritten short story with a Polaroid will do.  If you do fancier, a text document with a digital photo will suit, as well.   Sharing is the groundwork from which we can get your story out there.

Our club's webpages can reach any person surfing the net in the world, and even on the International Space Station, if they have a mind to view our website!

We are hoping for a possible tie-in to other informative programs upon which our fellow members might want to collaborate.  Contact any officer or board member with your suggestions.

Our next MOTM will be a surprise.  For 2009-10, we are waiting for your suggestions.  What mineral do you want to know more about?

aniagate.gif (1920 bytes)


Most of the Mineral of the Month selections have come from most recent club fieldtrips and March Show Themes, and from inspriring world locales. thus far.  If you have a suggestion for a future Mineral of the Month, please e-mail me at:, or tell me at our next meeting.



Some Past Minerals of the Month
May 2008 Mineral of the Month: Delaware Hornblende
April 2008 Mineral of the Month: Delaware Biotite Mica
March 2008 Mineral of the Month: Delaware Pegmatites
February 2008 Mineral of the Month: Exotic Pegmatites
January 2008 Mineral of the Month: Delaware Quartz, Part 2
December 2007 Mineral of the Month: Delaware Muscovite Mica
November 2007 Mineral of the Month: Delaware Beryl
October 2007 Mineral of the Month: Delaware Quartz, Part 1
September 2007 Mineral of the Month: Delaware Garnet: Almandite
August 2007 Mineral of the Month: Schorl (Black Tourmaline)
July 2007 Mineral of the Month: Rubellite
June 2007 Mineral of the Month: Elbaite 
May 2007 Mineral of the Month: Delaware Feldspar, Part 2
April 2007 Mineral of the Month: Delaware Feldspar: Plagioclase
March 2007 Mineral of the Month: "The Colors of Fluorite"
February 2007 Mineral of the Month: Pennsylvania Fluorite
January 2007 Mineral of the Month: Sillimanite
December 2006 Mineral of the Month: Hedenbergite by Karissa Hendershot
November 2006 Mineral of the Month: Brandywine Blue Gneiss
October 2006 Mineral of the Month: Spessartite by Karissa Hendershot
September 2006 Mineral of the Month: Native Silver
August 2006 Mineral of the Month: Kryptonite
August 2006 Mineral of the Month: Kryptonite
July 2006 Mineral of the Month: Azurite
June 2006 Mineral of the Month: Pyromorphite
May 2006 Mineral of the Month: Tsavorite by Karissa Hendershot
April 2006 Mineral of the Month: Variscite
March 2006 Mineral of the Month: Petrified Wood, Part II
February 2006 Mineral of the Month: Petrified Wood, Part I
January 2006 Mineral of the Month: Strontianite by Karissa Hendershot
December Mineral of the Month: Clinozoisite
November Mineral of the Month: Bismuth
October Mineral of the Month: Wulfenite by Karissa Hendershot
September Mineral of the Month: Turquoise
August Mineral of the Month: Peridot
July Mineral of the Month: Ruby
June Mineral of the Month: Antarctic Fluorite
May Mineral of the Month: Dolomite, Part 2
April Mineral of the Month: Dolomite, Part 1
March Mineral of the Month: Calcite
February Mineral of the Month: Agate
January Mineral of the Month: Fluorite
December Mineral of the Month: Pyrite
November Mineral of the Month: Stilbite  
October Mineral of the Month: Celestite   

This page last updated:  February 19, 2011 10:15:47 AM




Next Meeting

April Program, Monday, April 8, 2013:

"Destruction of the Fossil Exposures in the Chesapeake Bay Area" presented by Dr. Lauck Ward

General Club Meeting:
April 8, 2013

We are meeting at
Greenbank Mill

Special Meetings:

*Show Committee Meeting, April or May, 2013

*New Home/Lapidary Committee, 2013

*Board Meeting,  April, 2013

Next Field Trips


Past Fieldtrips

Next Show
DMS March Show
March 1-2, 2014 at DelTech Stanton


Our 2013 Show Theme was:
"All That Glitters is as Good as Gold!"

March Show 2013 Report






Fossil Forum

"Dinny, the Dino"

"Belemnites are coming"


MOTM June also commemorates our 50th Show!

It's shiny, yellow, and is a symbol of 50 Years!Can you guess?


Collecting Adventure Stories:

"Sunny Brook Crick Goethite" by Joe Dunleavy