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Khaidarkanite
Montgomeryite
Tourmaline
Kidwellite
Proustite
Tourmaline
Calcite
Szenicsite
Cyanotrichite
Orpiment
Rhodochrosite

Collector Quality Mineral Sales Since 1996. Online since 1998.
We Specialize in Minerals from the Black Hills of South Dakota

  New to this Website? Click Here The Periodic Table in Earth and Sky
August 15
The Daily Five will Resume in September

Next Update: Thursday, August 28 at 8AM US Mountain Time
Last Updated: Thursday, August 14th
Please note: All Orders made after Aug. 17 will not be shipped until Sept. 4

Convert Global Time Calculator or World Time Zones 

Lorenzenite - MSH

Emmonsite with Schmitterite - Moctezuma, Sonora, Mexico

Xanthoconite - Imiter mine

New Additions - scroll down!!

August 14, 2008
Mostly Species

August 28, 2008
Mostly Species

Aug. 12, 2008
Mix

Other Updates

     
 

MATRIX Magazine 
SD Issues I & II available for $20 each. While supply last.
Click Here

 

Website Features:

 

ANNOUNCEMENTS

  • On June 12, 2008 Dakota Matrix switched servers. DakotaQ of Rapid City is our new host. As a result, the database which drives the website has been upgraded. You should see a significant improvement in the speed of the website. In the near future, we will redesign our website to further improve upon it's functionality.

  • Because of increases by the US Postal Service, our rates have increased also. Effective immediately, all domestic priority rates are increased by 50 cents.

  • Just acquired the Dejan Polak collection in July, 2006. This is a systematic collection, which will be posted alongside the Kidwell Collection.

  • We acquired the Dr. A. L. Kidwell Collection in July, 2006. Look for continued postings throughout the Summer and Fall.

  • We will be participating in John Veevaert's Mineral-Auctions.com 
    sometime starting in October. If you've been watching these auctions, you undoubtedly have seen some fantastic mineral specimens go for easy money. There is a great group of dealers participating on these auctions - all of which are trusting and reliable. Don't look any further than Mineral-Auctions.com for screamin' deals.   

Dakota Matrix onMineral Auctions.com

Message Board

  • NOTICE: We changed our policy on ordering. Nothing earth shaking, but you may want to read about the changes. Click Ordering, Shipping and Payments.
  • We pay CASH for collections - if you are contemplating selling yours or know someone who is, please contact us.

Please see above for the Date and Time of the NEXT UPDATE!!
Check Time Zones at:
Time and Date.com or Tripod.com

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FAQ's - all about our site, ordering, payment etc.

Ordering, Shipping and Payments - Notice - New Policy on Ordering.

World Time Zones

MATRIX Magazine - A Journal of the History of Minerals.

Read Our Customer Testimonials

About Us

Articles & Publications by Tom Loomis

 
Show Reports

Tucson 2008

       
         

 

 

New to this Website?

Here are some tips for you:

  • When you see the smiley face , we have uploaded at least five new additions somewhere on the website for that date posted below the face. When you see a frowney face  , we haven't uploaded any minerals for the day. The "day" defined as sometime between 8AM and 10PM USA Mountain Time. So if you visit the website early in the day and see a frowney face, check back later. It may have changed to a smiley face! This will not include the main "New Additions Updates"  usually scheduled once per week. Postings this week include:
  • Monday: Jalpaite w/ Silver & Chrysocolla, Maucherite, Stewartite w/ Rockbridgeite & Mitridatite, Vanadinite

  • Tuesday: Cinnabar, Mimetite w/ Malachite, Paulingite-Ca, Rhodochrosite w/ Pyrite, Scheuchzerite

  • Wednesday: Check our update tomorrow at 12:00 MT for over 20 new additions

  • Thursday: Calcite "Sand Calcite", Chrysoberyl, Pyrite, Strengite w/ Phosphosiderite, Wicksite, & Barbosalite, Tourmaline - Rubellite (All South Dakota Localities)

  • FridayThe Periodic Table in Earth and Sky

  • We update at least once per week. Usually it's on Thursdays at 8AM Mountain Time. Click here for a time conversion. However sometimes the update is on Tuesday or Wednesday. These are Scheduled updates that are shown as one of the linked mineral photos above and published on the New Addition Galleries. Just look at the dates above and click on the link below the date or the photo above it. New Addition pages provide a means for you to see what has been posted without flipping through all the Galleries. However, see below.....
  • We don't always announce the New Addition updates via email. I don't like annoying you all the time with emails. You get enough spam. That's why we schedule our updates.
  • Every so often we launch a surprise update and publish these on the New Addition pages. No saying when that is, but you'll know when it happened by looking at the update notices above.
  • We also upload about 5 minerals per day to various galleries that ARE NOT on the New Addition Galleries. If you just feel like browsing the Galleries, you will find new minerals posted everyday in the Under/Over$50 and Rare Mineral Galleries. We do this because if you are new to the site, been away on vacation or whatever, we want you too to find good stuff rather than having missed out on the recent updates to the New Addition pages. So if you saw a mineral you missed out on in a recent update, check the galleries. You can also use the search engine if you have a specific mineral in mind.
  • We offer bulk mineral deals occasionally via email. Click here to see examples. If you are interested in these, ask to get on our email list.
  • We also offer basic, representative minerals on a text listing. Click here to view these text listings. We do not take photos of these. They are good minerals but we like to keep the price down therefore we don't like to put too much time and effort into them.
  •  We participate on Mineral-Auctions.com.
  • To Order please use the shopping cart. It's a three step process, so be sure to check out by clicking on the last link to send order. If you don't like the shopping you can email us your order. But beware, someone may "scoop" that specimen out from under you as I don't always catch the emails in time!!
  • You can pay by PAYPAL, credit card (secured), or send a check or money orders. New, established customers, must pay first. For more information on payments or shipping click here.
Contact Information: Tom Loomis
New email (as of July 1, 2008): dakotamatrix@gmail.com
NOTE - I still have the dakotamatrix@msn.com account. I just don't like it. Gmail is much better.


If your email to us gets bounced back try this address:
alternate email: dakotamatrix@gmail.com
Phone:  phone: (605) 718 - 9130
Address: Dakota Matrix Minerals
Tom Loomis
PO Box 415
Rapid City, South Dakota 57709
USA