Polka dot’s base colors range from blue to white to pale yellow. The dots can be almost any combination of yellow, orange, red, brown, or black. Nature has also marked some specimens with black dendrites. Other specimens are cross-cut by intrusions of brown jasper. The diaphaneity ranges from almost transparent to almost opaque. This color and geometry makes some of the most interesting and beautiful types of agate that you will ever see.Polka dot agate is an orbicular agate produced from the Priday Agate Beds of central Oregon. It has an appearance that sounds just like its name. It is a semitransparent to semitranslucent agate with suspended round “dots” of contrasting colors. It is a favorite Oregon gemstone.
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