I've just seen a web page that advertises and sells kitchen utensils made of Rock Maple, and they include the following explanation, I wonder how much of it is true.
"All of our kitchen utensils are made of Rock Maple which is the mineral section of the sugar tree grown here in Ontario, Canada. All of the dark lines and markings you see are actually minerals (rocks) embedded in the wood."
I know that one can find mineral deposits embedded in wood, I've found them myself in a couple of cases, but from that to what is stated there and the way it is said makes me think it is just selling mumbo jambo.
Any hint will be appreciated.
Thanks in advance