Often referred to every bit a “variety” of either hematite or goethite, it is a mixture of the 2 minerals due to the modification of goethite, typically flora inwards the botryoidal habit of the “parent” goethite. It may endure iridescent.
Turgite is a mixture of hematite in addition to goethite, both Fe oxide minerals. Since it is a mix, it is non recognized every bit a mineral. It obviously solely occurs nether specific environmental weather because the pieces I collected inwards Nevada in addition to brought domicile to New United Mexican U.S. of A. lost their luster in addition to turned to deadening gray hematite.