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What kinds of objects did Robert Hooke show in Micrographia?

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microscope Colour-enhanced scanning electron micrograph (magnified 50×) of a bean aphid on a leaf.

In his 1665 work Micrographia, Robert Hooke presented detailed studies and illustrations of various objects observed through the microscope. These included:

Snowflakes: He documented their crystal structure.12
Cork: He examined the microscopic honeycomb cavities within the material, famously coining the term cell to describe them.12
Fossils: His microscopic analysis of these specimens contributed to early theories of evolution.2

Additionally, the book discussed the potential for manufacturing artificial fibers by mimicking the process used by the silkworm.2