Determining the age of Quartz minerals is a fickle process as crystals grow in environments of certain pressures, heat and with certain chemical elements in cavities of the earth, these crystals grow and fill the cavities. When the environment changes for various reasons, the crystals may stop growing. At what point the crystal started to grow or stops its growth cycle is undeterminable.
Quartz veins of the Ouachita Mountain region in Arkansas were laid down in the late Palaeozoic era around 280 to 245 million years ago, the Quartz veins are between sixty and one hundred feet thick and run from Oklahoma to Arkansas. Quartz and other mineral veins were deposited from hot water in the closing stages of mountain building.
Part of the trigonal crystal system where the most popular crystal form is a six-sided prism terminating externally to a pyramid point. Often twinned, distorted, or intergrown with surrounding quartz crystals. Crystals form in clusters or 'crystal beds'. Clusters consist of unconstrained growth into a void, usually attached to the matrix at the base of the Quartz structure.