Unpolished slab - Slab may be a good representative of banded iron formation, but it has NOT been polished as stated in the product description. It has been cut and ground flat, and then heavily coated with some sort of plastic resin for gloss and to increase color contrast.
WARDSCI.com associatePublished 01/20/2014
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Ward's® Banded Iron Formation
SpecimensRock SpecimensSpecialty Rocks
A sawn and lacquered slab of classic Precambrian banded layers of hematite (iron) and quartz. Average size: 3" x 4". Ontario, Canada.
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