The Iron Lace agate, as named by the Ispheming Club, has been extracted from a single vein of agate by an interested iron miner working at the open-pit Republic Iron Mine of Michigan during its active mining periods (1970s). It is not known if any more agates are still available from that mine, but it is possible to find some more if one is willing to overturn tons of rocks at the mine dumps. Covering the botryial masses of hematite, the agates were found as the forms of thin seams within the metamorphic iron formations. The most common colors are white and yellow and the rare bright red color would be most desired color of all. The Iron Lace Agates are the only type of agate that I know of coming from metamorphic rocks. Some are magnetic due to higher iron ore content.

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