Macro Photos – Vaguely Familiar Abstracts

Can you guess what these ‘abstract photos’ are – from the hints in the quotations below the photo?

There was a rough stone age and a smooth stone age and a bronze age, and many years afterward a cut-glass age. In the cut-glass age, when young ladies had persuaded young men with long, curly mustaches to marry them, they sat down several months afterward and wrote thank-you notes for all sorts of cut-glass presents…
– F. Scott Fitzgerald, The Cut-Glass Bowl –

…we live on the edge of the abstract all the time. Look at something solid in the known world: an automobile. Separate the fender, the hood, the roof, lie them on the garage floor, walk around them. Let go of the urge to reassemble the car or to pronounce fender, hood, roof. Look at them as curve, line, form.
― Natalie Goldberg, Living Color: Painting, Writing, and the Bones of Seeing –

The pine stays green in winter… wisdom in hardship.
– Norman Douglas –

Deciding whether or not to trust a person is like deciding whether or not to climb a tree because you might get a wonderful view from the highest branch or you might simply get covered in sap and for this reason many people choose to spend their time alone and indoors where it is harder to get a splinter.
― Lemony Snicket, The Penultimate Peril –

Here are what the photos are:
The first is a close up look at a cut-glass bowl.
The second is the side of the hood of a 1934 Ford custom roadster – sold at Barrett-Jackson in 2016 for $60,500.
The third is a close up of spruce tree needles peeking out of the snow.
The last is a drop of spruce resin (sap).

This week’s WordPress Photo Challenge – Abstract