Ludlamite on Siderite - San Antonio Mine, Santa Eulalia, Aquiles Serdán Mun., Chihuahua, Mexico More info: https://www.irocks.com/minerals/specimen/51839 Ludlamite in sharp crystals of this caliber is well known from the old finds in Bolivia, more recently from large finds in Brazil (though of a different style of crystal shape); and very very rarely from a few other localities in the world. This is from one of those exceptions, where most people have never seen a good ludlamite. These were foun

Siderite and Sphalerite ps. Calcite - Broken Hill Mine, Aggeneys, Namakwa Dist. Mun., Northern Cape, South Africa More info: https://www.irocks.com/minerals/specimen/53190 From a relatively small find in 2006 from the Broken Hill Mine (misleadingly labeled as the Aggeneys Mine when they were first brought out) in South Africa, these unusual crystals are actually hollow casts after calcite that are epimorphic shells comprised of a mixture of mixture of siderite and sphalerite (some spots are more