Moh's Hardness Crystalline Form Safety Essentials Spring-contacts in fully insulated fixtures

Spring-contacts in fully insulated fixtures

Big demonstration Electroscope

Cubes Set of 6 Kinds Materials

Quick spin function with press and hold pulse key

Double Side Black PVC Dots

Moh's Hardness Crystalline Form Safety Essentials Spring-contacts in fully insulated fixturesHoused in a compartmented collection box, and an identification list is included. 9 numbered samples, 1" x 1" streak plate magnet glass slide copper strip. Minerals: Talc, Selenite, Calcite, Fluorite, Apatite, Microcline, Quartz, Topaz, Corundum All samples are pure crystalline forms to ensure accurate test results. You can also perform other physical properties tests with the included materials. If you need custom order with different sizes design,