Slag is the glass-like by-product left over after a desired metal has been separated from its raw ore. Slag is usually a mixture of metal oxides and silicon dioxide; however, slags can contain metal sulfides and elemental metals. While slags are generally used to remove waste in metal smelting, they can also serve other purposes, such as assisting in the temperature control of the smelting, and minimizing any re-oxidation of the final liquid metal product before the molten metal is removed from the furnace and used to make solid metal. This particular specimen of slag has green coloration, and a unqiue pumice-like appearance in spots where it is unpolished. It's large enough to serve as a paperweight, and makes for a great sample to be passed around in earth science classrooms. Makes a great gift for the mineral collector in your family!
Note: Please be aware that this is a natural mineral and as such each piece is one of a kind! The one you receive may not be exactly the same as the ones pictured but it will be similar. Price is per each piece. They come in irregular shapes, sizes and weights.
This black scorpion specimen is great for the classroom setting!
Get swept away by this fantastic robot kit that uses vibrations to move!
Cool new Pi tee featuring ultra soft and light blue 100% cotton shirt.
This glass Erlenmeyer mug makes an excellent gift!
A massive mounted set of 100 rocks and minerals found in the US,
Build a model green house and 9 other green energy-related devices with this great kit!
At xUmp.com you will find a large selection of scientific products carefully curated by real scientists and educators. We sell everything from educational toys, teacher supplies for science classroom, lab equipment, science toys, science fair supplies, classroom equipment, chemistry glassware, chemistry lab equipment, physics demos, electronics supplies, robots, science kits to geeky science gifts.