My friend and I came to visit our friend's gem cutting shop in Dar Es Salaam and have actually seen the the actual way of drilling a whole on the stone. I have used the cabbing and faceting machines but not this drilling machine yet. Lucky enough Adam was there to do the drilling for us. Few stones were drilled in few minutes, roughly 1-2 minutes drilling of each stone depending on the hardness and size of the stones. Water must be constant to avoid breakage on the stone.
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