Have you ever heard of Niagara Spar? I have on my desk beside me a chunk of this spar.
This rock at one time was taken in large quantities in the mid eighteen hundreds from below and behind the Canadian Horseshoe Falls .Entrepreneurs labeled the rock, “Petrified Mist” or “Niagara Spar” and they fashioned all kinds of jewellery from this form of calcite stone (which was easy to carve).
Later when the supply ran out, the raw material was imported from England.
Today, it is rare to see both Niagara Spar Jewelry and the stone itself.