whereas titanium can create blue. Manganese can produce pink crystals and nickel or chromium can create green. Neat, right? Geode vs. Agate: What's the Difference? While both geodes and agates are ...

Dictionary.com defines "geode" as: "a hollow concretionary or nodular stone often lined with crystals," so it only makes sense for something so precious ... and more dramatic geode countertop ...