| ari ((RUTILE paramorph after BROOKITE)), $5 MINIMUM BID, MCTC Mine, Magnet Cover, Arkansas, 2 x 1.5 x 1.3 cm, Thumbnail | |
 | Here is a classic Arkansas paramorph. A paramorph is the same chemical composition but a different species than the crystal form. Rutile, Brookite, and Anatase are all titanium oxide. Here Rutile has replaced the original Brookite crystal. |
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