Obsidian is a rock which is a type of naturally occurring glass produced by volcanoes. It lacks crystal structure, which can make it have extremely thin edges. This is the reason why obsidian was often used as arrowheads in a variety of ancient cultures. You can have your very own arrowhead to show to your friends! A great collectible item for the Native American art collector!
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.
The large realistic model has removable organs that can be studied and set back into the correct position.
Learn all about the science of light, optics and visual perception with this wonderful kit!
Build a hand that realistically moves its fingers using shape memory allow technology!
Check out this amazing renewable energy science kit featuring the wonders of hydroelectric power!
Is it a demonstration of a scientific law or a work of art?
Great reference card for chemistry and physics students.