| 14hdcer ((HEMATITE aka RAINBOW HEMATITE)), $10 MINIMUM BID, Andrade Mine, Joao Monlevade, Minas Gerais, Brazil, 5 x 1.5 x .5 cm, Miniature | |
 | Totally natural. The iridescence is caused by a thin layer of Aluminum Phosphate on the surface of the Mica like flakes of Hematite. Frequently these are used in wirewrap jewelry for pendants etc. ex Wrights rock shop. |
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