But when you discern me, this fact you will know.
Doctors’ stuff I convey and small matters unfold,
Yet rare gems I preserve and great nuggets of gold.
In form I am round or three-cornered or square,
And at once I am known as both common and rare.
If you wish to be safe when you look at a show,
You must pay for, and take me, and sit in a row.
Clothed in crimson, and purple, and black I am seen,
Yet in gardens in winter I’m constantly green.
I am valued and dear, though ’tis equally clear,