There is mounting evidence that hydrocarbons were present when the various types of quartz crystals were growing in the Herkimer Mining District. This web page lists the range of features seen at the boundary between quartz, mostly Herkimer diamonds, and hydrocarbon.
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The information, and photography, on this website is copyright protected by W. David Hoisington, Ph. D. unless another author/photographer is cited.
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Note: This page is under construction. As the evidence is added there will be separate links to each feature below where more photography can be found The list may also expand with further research. If you know of a feature not listed please contact Dr. C.
Note: Crystal frost features are always found at the quartz - hydrocarbon boundary
Flat and Stacked Arches
Nipple Tipped Arches
Clear Arches and Ghost Arches
Tip Contact Arches
3d Arches and “fish” shaped fragments
If you have a collection of Herkimer diamonds then you most likely have some of these quartz - hydrocarbon features in your crystals.
Thank you Kathryn S. for the donation of 27 samples which were carefully field collected to demonstrate curved features in quartz. 6/30/2018