Here are some nice images of the alga Spirogyra. These algae have a spiral-shaped chloroplast. The video also shows other algae in colonies.

Unless it is fine-grained, sand is a bit more difficult to observe under the microscope. Darkfiled microscopy shows quite nicely, that many sand grains are transparent (some made made of quartz).

Dandelion seeds are scattered by wind. Here I am having a look at the fruit of a dandelion. The fruits are the fine “hairs” that carry the seed. In the field of Biology the term “fruit” does not have the same meaning as in everyday usage.

A review of Toupcam S3CMOS, a USB 3 microscope camera

Here we have a focus animation of two radiolaria. The shells of these organisms are made of silica, which is similar to glass.