Description

Deming Agate, for Deming, New Mexico, generally thunder eggs, has been described as, vein and nodular agate with fortification, moss, dendritic, flame, and orbicular patterns. Some specimens will contain sagenite needle inclusions.

Agates mostly occur as nodules in volcanic rocks or waters containing Silica in solution which is possibly derived from the decomposition of Silicates in the lava.  The Siliceous matter is deposited in regular layers resulting in the banded or striped formation.  It is very unlikely that you would ever find an exact duplicate of any type of Agate.