I don’t really thing that there is any real difference between Herkimer and regular clear quartz,H.D. are more powerful for sound quality even very small one...
Quartz is not always "quartz"....All is not equal....Anyway....
Minerals are like trees they grow with different characters in different area of the world...
And using micro H.D. on a S.G. is easy to do and you can do an experiment using regular quartz and a good H.D. the difference will be less harshness more "fluid" effect....
All minerals works with an effect on cable for example and each minerals has his own signature , Jasper is not agate.... And some are bad....I experimented with 30 for fun.... At the end my most used are tourmaline, H.D. and shungite.... But shungite must no be used on main gear at all....And always use copper tape on a side.... I called that my "golden plate" it is a passive filtering all along my electrical line....Try a couple and listen....It is free i sold nothing....I bought nothing.... I created or replicated at no cost....
Anyway i am nuts but i am happy...
My system of 500 bucks is all i need... Thanks to my complete " hallucinations" ... I thank God to not be an average consumer reading specs sheets like if it was truth manifested by the manufacturer and here in my city no blindtest is necessary, we are all "bat" coming from another dimension and clothed as humans....
«Trust your ears they will never deceive you without giving to you an ecstasy»-Myself