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Is it true that a good portion of aventurine batches end up as waste? I've heard that the stuff we see is only drawn from the center of the vat.
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I can not answer that question now, but I did go to a factory that made goldstone.
At the end of our tour we came upon a small room with two men sitting in chairs with rock picks and hammering away at a rock of goldstone that must have weighed 1,000 pounds or more.
They divided the glass into three different boxes.
One box held the goldstone rock that had green running through it, trash.
One box held the goldstone with the large stars that would be sold to
companies melting goldstone to be made into some glass product.
One box held the goldstone with the small stars that would be used for jewelry as it was more reflective and of jewelry Quality.
Mikey