Apophyllite is prized for its clarity and architectural geometry — it’s one of the most light-reactive minerals from the Deccan basalt pockets. India’s Deccan Traps produce the finest and most display-worthy material.
It was the first mineral named after a person — Colonel Hendrik von Prehn (18th century) — and is sometimes referred to as the “grape jade” of collectors due to its rounded formations.
Vanadinite is a lead vanadate chloride mineral famous for its bright red hexagonal crystals. It’s one of the classic collector minerals from Morocco and a major secondary ore of vanadium.
Tourmaline is known as the “rainbow mineral” because it can form in nearly every color. Most crystals grow long and narrow with distinctive vertical grooves. A green-cap tourmaline naturally changes color at its tip.
Arkansas is home to some of the clearest quartz on Earth. The Ouachita Mountains, especially around Mount Ida, Hot Springs, and Jessieville, produce exceptionally transparent crystals often called “water quartz” or “water-clear quartz.”
Optically clear quartz crystals that contain tiny pockets of trapped hydrocarbon fluids, actual crude petroleum that was sealed inside the crystal as it grew.
