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"Vintage" simply means old, "Antique" means more than 100 years old. At least thats my understanding of the terms. I hope someone corrects this if I am mistaken.
BTW...The synthetic ( man made)...

If it laps easily and leaves a dry powder then you did well.

Escher, Thuringen, German Waterstone are all the same type of natural rock.
Other brand names were also used.....