Engineering with Rust: Ownership, Safety, and the Design of Long-Lived Systems

100g Micron Sized Copper Powder, 99.99% High-Purity Cu, for Element Sample Collection, Classroom Demonstrations, Scientific Research, and Laboratory Experimental Projects

Rainbow Bismuth Crystal WYSIWYG #9 504 Grams Stone Specimen for Collecting Decoration Wicca Reiki Energy Healing 99.99% USA Pure Mineral Element by Awesome Industries

100g Copper Powder, 1000 Mesh, 99.99% High-Purity Cu, for Element Sample Collection, Classroom Demonstrations, Scientific Research, and Laboratory Experimental Projects

Geoscience Industries - 1750-000 - Large Specimen-Rock Collection (Each)

100g Copper Powder, 99.99% High-Purity Copper,for Element Sample Collection, Classroom Demonstrations, Scientific Research and Laboratory Experimental Projects

Bee, Scorpion, Scarab and Other Insect Specimens, Transparent Resin Amber, Very Suitable for Kids Educational Science Specimens, Collection, Decoration 2.4″*1.4″*0.7″ (Lygaeid Bug)

Colidcolor Professional Streak Plate Kit for Mohs Hardness Testing Geology, Mining, Industrial Material Hardness Test Tool (12-Piece)

Bat Specimen, Real High Quality Resin Bat Specimen for Science Classroom Science Education, Biology, Collections, Animal Study Enthusiasts, Quirky Animal Skulls (Bat 5.6x2.6x0.8 Inch)