DXL2 Barite
Linwood Mine, Buffalo, Scott Co., Iowa, United States
16.5x 10.5x 3.5 cm
$395

A sizable and exceptionally lustrous barite from the Linwood Mine, located in the Midwestern state of Iowa. the Linwood Mine has produced some of the country"s finest (and certainly largest) barite crystals, though it had not received the same attention as Elk Creek (South Dakota), the various Colorado localities, or the Meikle Mine (Nevada).

 

The crystal is double terminated, and has a number of other crystals perched to it.  Like 98% of these, the back side is not much to look at-- they tended to form against flat sedimentary surfaces.

 

There are a couple scratches/ chips about half way up the main crystal, on the left.  These are visible in the pictures, though perhaps not as much as in person.  Given what these were selling for (and what some folks are still asking) this is still a very good price for a double terminated crystal of this size/ luster.

 

The Linwood Mine opened in 1941 and is an active producer of calcium carbonate products, which are used in glass and plastic manufacture, cements and other building materials, feed, water purification, and various other chemical applications.  Given the high purity of product necessary for such uses, the presence of these barium sulfate crystals is actually considered a bad thing--when crushed into the mix, they become contaminants.

 

The site was originally operated as a quarry, though is now an underground mine.

 

The Linwood Mine is an active producer of calcium carbonate products, as such the presence of these crystals is actually considered a bad thing, as far as the purity of the product is concerned.  










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