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