aww...those optical types just have no taste! That is a winner if I ever saw one!
(and I do 'occasionally' have a need to drill or smooth a piece of agate for my crafts...will sure call you!)
....here's one more song..
I Might Surmise
.....Chorus: I might surmise when the sun she rises,
Early in morning
Sunlight still tries to go on winging
Merrily along a straight line.
Oh, for the light which still acts classic,
And rambles through inertial frames.
Well, the theory goes
As I'm sure you knows,
Light at a constant speed forever goes.
But in younger days, force was still m/a,
And we rambled in inertial frames.
It was Winter when I sent my twin away
In Spring he came back younger by a day
And by Summer if his speed's near c,
He won't even look a bit like me.