Quartz minerals are usually thought of as large single crystals. Microcrystalline quartz, however, is dense with crystal grains so small that an optical microscope...
How do agates form? With so many variables including temperature, pressure and chemistry that can influence silicon dioxide as it forms, we may never...
Australia's Agate Creek has been producing agate for more than fifty years. It's a popular rockhounding spot and camping area with agate that commonly...