1. In this miniature sculpture, the artist uses amber, which is the fossilized, hardened JXUwMDJhJXUwMDE3JXUwMDE2JXUwMDFhJXUwMDA3 of the pine tree and one of the few gemstones of organic origin.

Photo published by Catherinette Rings Steampunk on Flickr under a CC BY-NC-SA 2.0 license.

2. Iron, copper and silver are JXUwMDM1JXUwMDA4JXUwMDExJXUwMDE1JXUwMDBkJXUwMDFm , i.e. solid materials which are typically hard, shiny, malleable, fusible and ductile, with good electrical and thermal conductivity.
Source: WordReference.

3. This camel is made of e JXUwMDM5JXUwMDEzJXUwMDA2JXUwMDFjJXUwMDBkJXUwMDBiJXUwMDE5JXUwMDE2JXUwMDEzJXUw MDE3 , i.e. pottery made of fired clay.

Image published on Flickr by mharrsch under a CC BY-NC-SA 2.0 license.

4. Inspired by the Cholla cacti, the interesting life-size textile sculpture shown below is made entirely from recycled women's clothing, all hand stitched, airbrushed and sealed with a UV protectant. The three main branches are formed on a mesh armature, then covered in f JXUwMDM5JXUwMDAzJXUwMDEwJXUwMDFiJXUwMDBh (Spanish “tela”).

Photo published on Flickr by Wendy Moyer under a CC BY-NC-ND 2.0 license.