Ludlamite (Idaho, USA) | Green Crystal, Rare Mineral SpecimenLudlamite from Idaho is a rare and visually striking phosphate mineral, prized by collectors for its deep green color and glassy luster. Chemically known as a hydrated iron phosphate, ludlamite forms in oxidized zones of iron rich ore deposits, often alongside minerals like vivianite and strengite. These specimens are valued not only for their rich emerald to olive green hues, but also for their relative scarcity in well formed crystals. Idaho