highly variable Chalcedony spheres or roses are almost geode-like in appearance and one can clearly see the process of geode or agate formation in progress in each specimen
red and many other colors corresponding to their physical makeup and conditions when the mineral was formed
and is one of the more common gems although pieces of exceptional hue and clarity are considered fairly rare and can be extremely valuable
Amethyst is a form of Quartz which gets its beautiful purple tint from the substitution of silicone for iron due to irradiation
where some truly impressive specimens like this very rarely emerge from the mines
Fluorite Green Fluorite highly variable Chalcedony spheres orFluorite is one of the most variable of all crystalline minerals, occurring in shades of blue, green, purple, red and many other colors corresponding to their physical makeup and conditions when the mineral was formed. The name fluorite comes from its use as a flux, or chemical cleaning agent, in iron smelting and other metallurgy. Pure fluorite is clear, but most specimens have vivid color due to various impurities and are often fluorescent. With a