Materials study

I currently level up my artistic skills in Smirnov School and study materials. For a school task i made some material balls in 2D art. Featuring nine different materials like amber (this poor butterfly really saw some stuff...), my beloved gems like opal and malachite, different types of plastic and metal, oilslick effect, and tasty salmon. I'd love to make more, as this finally makes me feel less useless. A lot of my artworks in past were materialless at all.