Natural, or raw, Herkimer quartz crystals are an amazing accomplishment of Mother Nature. They formed with 18 natural facets and double termination points (dt's). Herkimer Diamonds were formed by tremendous heat 300-500 million years ago beneath a shallow sea bed of the rock dolomite, now New York state. Beginning as limestone and calcite rock; and while still under water, magnesium mixed in. This new addition created the sedimentary rock called dolomite. Pockets and vugs within the dolomite were filled with fluid rich in silicon dioxide, or quartz, providing the material to allow the clear crystals to form. One explanation as to the double terminations points of Herkimers is that the fluid filled pockets allowed them to form freely, providing the opportunity to terminate on both ends. Another explanation to the double termination's is silica has no attraction to the dolomite rock and avoids attachment to it. Either way, Mother Nature out did herself with the creation of these natural quartz crystals.
This particular Herkimer Diamond has an interesting shape, it's flatter than most, and skewed.
It's excellent clarity displays well in the pictures. The clear inclusion adds interest, but is much smaller than the pictures show (pics are taken with camera's macro lens).
A touch of external growth marring is present, it's clear and not really noticeable to the naked eye. It does prove it is a natural, or raw quartz crystal. Double termination tips are sharp and complete.
A fantastic raw Herkimer Diamond from NY state.